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[PATCH] Char: cyclades, cleanup
[linux-2.6-block.git] / drivers / char / cyclades.c
CommitLineData
1da177e4
LT		 1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
1da177e4
LT		 4
5/*
6 * linux/drivers/char/cyclades.c
7 *
8 * This file contains the driver for the Cyclades async multiport
9 * serial boards.
10 *
11 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
12 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
13 * Currently maintained by Cyclades team <async@cyclades.com>.
14 *
15 * For Technical support and installation problems, please send e-mail
16 * to support@cyclades.com.
17 *
18 * Much of the design and some of the code came from serial.c
19 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
20 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
21 * and then fixed as suggested by Michael K. Johnson 12/12/92.
22 *
23 * This version supports shared IRQ's (only for PCI boards).
24 *
25 * $Log: cyclades.c,v $
26 * Prevent users from opening non-existing Z ports.
27 *
28 * Revision 2.3.2.8 2000/07/06 18:14:16 ivan
29 * Fixed the PCI detection function to work properly on Alpha systems.
30 * Implemented support for TIOCSERGETLSR ioctl.
31 * Implemented full support for non-standard baud rates.
32 *
33 * Revision 2.3.2.7 2000/06/01 18:26:34 ivan
34 * Request PLX I/O region, although driver doesn't use it, to avoid
35 * problems with other drivers accessing it.
36 * Removed count for on-board buffer characters in cy_chars_in_buffer
37 * (Cyclades-Z only).
38 *
39 * Revision 2.3.2.6 2000/05/05 13:56:05 ivan
40 * Driver now reports physical instead of virtual memory addresses.
41 * Masks were added to some Cyclades-Z read accesses.
42 * Implemented workaround for PLX9050 bug that would cause a system lockup
43 * in certain systems, depending on the MMIO addresses allocated to the
44 * board.
45 * Changed the Tx interrupt programming in the CD1400 chips to boost up
46 * performance (Cyclom-Y only).
47 * Code is now compliant with the new module interface (module_[init|exit]).
48 * Make use of the PCI helper functions to access PCI resources.
49 * Did some code "housekeeping".
50 *
51 * Revision 2.3.2.5 2000/01/19 14:35:33 ivan
52 * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
53 *
54 * Revision 2.3.2.4 2000/01/17 09:19:40 ivan
55 * Fixed SMP locking in Cyclom-Y interrupt handler.
56 *
57 * Revision 2.3.2.3 1999/12/28 12:11:39 ivan
58 * Added a new cyclades_card field called nports to allow the driver to
59 * know the exact number of ports found by the Z firmware after its load;
60 * RX buffer contention prevention logic on interrupt op mode revisited
61 * (Cyclades-Z only);
62 * Revisited printk's for Z debug;
63 * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
64 *
65 * Revision 2.3.2.2 1999/10/01 11:27:43 ivan
66 * Fixed bug in cyz_poll that would make all ports but port 0
67 * unable to transmit/receive data (Cyclades-Z only);
68 * Implemented logic to prevent the RX buffer from being stuck with data
69 * due to a driver / firmware race condition in interrupt op mode
70 * (Cyclades-Z only);
71 * Fixed bug in block_til_ready logic that would lead to a system crash;
72 * Revisited cy_close spinlock usage;
73 *
74 * Revision 2.3.2.1 1999/09/28 11:01:22 ivan
75 * Revisited CONFIG_PCI conditional compilation for PCI board support;
76 * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
77 * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
78 * Removed CTS handling from the driver -- this is now completely handled
79 * by the firmware (Cyclades-Z only);
80 * Flush RX on-board buffers on a port open (Cyclades-Z only);
81 * Fixed handling of ASYNC_SPD_* TTY flags;
82 * Module unload now unmaps all memory area allocated by ioremap;
83 *
84 * Revision 2.3.1.1 1999/07/15 16:45:53 ivan
85 * Removed CY_PROC conditional compilation;
86 * Implemented SMP-awareness for the driver;
87 * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
88 * functions;
89 * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
90 * (irq=NN) as parameters (only for ISA boards);
91 * Fixed bug in set_line_char that would prevent the Cyclades-Z
92 * ports from being configured at speeds above 115.2Kbps;
93 * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
94 * switching from working properly;
95 * The driver now only prints IRQ info for the Cyclades-Z if it's
96 * configured to work in interrupt mode;
97 *
98 * Revision 2.2.2.3 1999/06/28 11:13:29 ivan
99 * Added support for interrupt mode operation for the Z cards;
100 * Removed the driver inactivity control for the Z;
101 * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
102 * the Z firmware is not loaded yet;
103 * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
104 * same functionality;
105 * Implemented workaround for IRQ setting loss on the PCI configuration
106 * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
107 *
108 * Revision 2.2.2.2 1999/05/14 17:18:15 ivan
109 * /proc entry location changed to /proc/tty/driver/cyclades;
110 * Added support to shared IRQ's (only for PCI boards);
111 * Added support for Cobalt Qube2 systems;
112 * IRQ [de]allocation scheme revisited;
113 * BREAK implementation changed in order to make use of the 'break_ctl'
114 * TTY facility;
115 * Fixed typo in TTY structure field 'driver_name';
116 * Included a PCI bridge reset and EEPROM reload in the board
117 * initialization code (for both Y and Z series).
118 *
119 * Revision 2.2.2.1 1999/04/08 16:17:43 ivan
120 * Fixed a bug in cy_wait_until_sent that was preventing the port to be
121 * closed properly after a SIGINT;
122 * Module usage counter scheme revisited;
123 * Added support to the upcoming Y PCI boards (i.e., support to additional
124 * PCI Device ID's).
125 *
126 * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
127 * Removed all unnecessary page-alignement operations in ioremap calls
128 * (ioremap is currently safe for these operations).
129 *
130 * Revision 2.2.1.9 1998/12/30 18:18:30 ivan
131 * Changed access to PLX PCI bridge registers from I/O to MMIO, in
132 * order to make PLX9050-based boards work with certain motherboards.
133 *
134 * Revision 2.2.1.8 1998/11/13 12:46:20 ivan
135 * cy_close function now resets (correctly) the tty->closing flag;
136 * JIFFIES_DIFF macro fixed.
137 *
138 * Revision 2.2.1.7 1998/09/03 12:07:28 ivan
139 * Fixed bug in cy_close function, which was not informing HW of
140 * which port should have the reception disabled before doing so;
141 * fixed Cyclom-8YoP hardware detection bug.
142 *
143 * Revision 2.2.1.6 1998/08/20 17:15:39 ivan
144 * Fixed bug in cy_close function, which causes malfunction
145 * of one of the first 4 ports when a higher port is closed
146 * (Cyclom-Y only).
147 *
148 * Revision 2.2.1.5 1998/08/10 18:10:28 ivan
149 * Fixed Cyclom-4Yo hardware detection bug.
150 *
151 * Revision 2.2.1.4 1998/08/04 11:02:50 ivan
152 * /proc/cyclades implementation with great collaboration of
153 * Marc Lewis <marc@blarg.net>;
154 * cyy_interrupt was changed to avoid occurrence of kernel oopses
155 * during PPP operation.
156 *
157 * Revision 2.2.1.3 1998/06/01 12:09:10 ivan
158 * General code review in order to comply with 2.1 kernel standards;
159 * data loss prevention for slow devices revisited (cy_wait_until_sent
160 * was created);
161 * removed conditional compilation for new/old PCI structure support
162 * (now the driver only supports the new PCI structure).
163 *
164 * Revision 2.2.1.1 1998/03/19 16:43:12 ivan
165 * added conditional compilation for new/old PCI structure support;
166 * removed kernel series (2.0.x / 2.1.x) conditional compilation.
167 *
168 * Revision 2.1.1.3 1998/03/16 18:01:12 ivan
169 * cleaned up the data loss fix;
170 * fixed XON/XOFF handling once more (Cyclades-Z);
171 * general review of the driver routines;
172 * introduction of a mechanism to prevent data loss with slow
173 * printers, by forcing a delay before closing the port.
174 *
175 * Revision 2.1.1.2 1998/02/17 16:50:00 ivan
176 * fixed detection/handling of new CD1400 in Ye boards;
177 * fixed XON/XOFF handling (Cyclades-Z);
178 * fixed data loss caused by a premature port close;
179 * introduction of a flag that holds the CD1400 version ID per port
180 * (used by the CYGETCD1400VER new ioctl).
181 *
182 * Revision 2.1.1.1 1997/12/03 17:31:19 ivan
183 * Code review for the module cleanup routine;
184 * fixed RTS and DTR status report for new CD1400's in get_modem_info;
185 * includes anonymous changes regarding signal_pending.
186 *
187 * Revision 2.1 1997/11/01 17:42:41 ivan
188 * Changes in the driver to support Alpha systems (except 8Zo V_1);
189 * BREAK fix for the Cyclades-Z boards;
190 * driver inactivity control by FW implemented;
191 * introduction of flag that allows driver to take advantage of
192 * a special CD1400 feature related to HW flow control;
193 * added support for the CD1400 rev. J (Cyclom-Y boards);
194 * introduction of ioctls to:
195 * - control the rtsdtr_inv flag (Cyclom-Y);
196 * - control the rflow flag (Cyclom-Y);
197 * - adjust the polling interval (Cyclades-Z);
198 *
199 * Revision 1.36.4.33 1997/06/27 19:00:00 ivan
200 * Fixes related to kernel version conditional
201 * compilation.
202 *
203 * Revision 1.36.4.32 1997/06/14 19:30:00 ivan
204 * Compatibility issues between kernels 2.0.x and
205 * 2.1.x (mainly related to clear_bit function).
206 *
207 * Revision 1.36.4.31 1997/06/03 15:30:00 ivan
208 * Changes to define the memory window according to the
209 * board type.
210 *
211 * Revision 1.36.4.30 1997/05/16 15:30:00 daniel
212 * Changes to support new cycladesZ boards.
213 *
214 * Revision 1.36.4.29 1997/05/12 11:30:00 daniel
215 * Merge of Bentson's and Daniel's version 1.36.4.28.
216 * Corrects bug in cy_detect_pci: check if there are more
217 * ports than the number of static structs allocated.
218 * Warning message during initialization if this driver is
219 * used with the new generation of cycladesZ boards. Those
220 * will be supported only in next release of the driver.
221 * Corrects bug in cy_detect_pci and cy_detect_isa that
222 * returned wrong number of VALID boards, when a cyclomY
223 * was found with no serial modules connected.
224 * Changes to use current (2.1.x) kernel subroutine names
225 * and created macros for compilation with 2.0.x kernel,
226 * instead of the other way around.
227 *
228 * Revision 1.36.4.28 1997/05/?? ??:00:00 bentson
229 * Change queue_task_irq_off to queue_task_irq.
230 * The inline function queue_task_irq_off (tqueue.h)
231 * was removed from latest releases of 2.1.x kernel.
232 * Use of macro __init to mark the initialization
233 * routines, so memory can be reused.
234 * Also incorporate implementation of critical region
235 * in function cleanup_module() created by anonymous
236 * linuxer.
237 *
238 * Revision 1.36.4.28 1997/04/25 16:00:00 daniel
239 * Change to support new firmware that solves DCD problem:
240 * application could fail to receive SIGHUP signal when DCD
241 * varying too fast.
242 *
243 * Revision 1.36.4.27 1997/03/26 10:30:00 daniel
244 * Changed for support linux versions 2.1.X.
245 * Backward compatible with linux versions 2.0.X.
246 * Corrected illegal use of filler field in
247 * CH_CTRL struct.
248 * Deleted some debug messages.
249 *
250 * Revision 1.36.4.26 1997/02/27 12:00:00 daniel
251 * Included check for NULL tty pointer in cyz_poll.
252 *
253 * Revision 1.36.4.25 1997/02/26 16:28:30 bentson
254 * Bill Foster at Blarg! Online services noticed that
255 * some of the switch elements of -Z modem control
256 * lacked a closing "break;"
257 *
258 * Revision 1.36.4.24 1997/02/24 11:00:00 daniel
259 * Changed low water threshold for buffer xmit_buf
260 *
261 * Revision 1.36.4.23 1996/12/02 21:50:16 bentson
262 * Marcio provided fix to modem status fetch for -Z
263 *
264 * Revision 1.36.4.22 1996/10/28 22:41:17 bentson
265 * improve mapping of -Z control page (thanks to Steve
266 * Price <stevep@fa.tdktca.com> for help on this)
267 *
268 * Revision 1.36.4.21 1996/09/10 17:00:10 bentson
269 * shift from CPU-bound to memcopy in cyz_polling operation
270 *
271 * Revision 1.36.4.20 1996/09/09 18:30:32 Bentson
272 * Added support to set and report higher speeds.
273 *
274 * Revision 1.36.4.19c 1996/08/09 10:00:00 Marcio Saito
275 * Some fixes in the HW flow control for the BETA release.
276 * Don't try to register the IRQ.
277 *
278 * Revision 1.36.4.19 1996/08/08 16:23:18 Bentson
279 * make sure "cyc" appears in all kernel messages; all soft interrupts
280 * handled by same routine; recognize out-of-band reception; comment
281 * out some diagnostic messages; leave RTS/CTS flow control to hardware;
33430dc5 282 * fix race condition in -Z buffer management; only -Y needs to explicitly
1da177e4
LT		 283 * flush chars; tidy up some startup messages;
284 *
285 * Revision 1.36.4.18 1996/07/25 18:57:31 bentson
286 * shift MOD_INC_USE_COUNT location to match
287 * serial.c; purge some diagnostic messages;
288 *
289 * Revision 1.36.4.17 1996/07/25 18:01:08 bentson
290 * enable modem status messages and fetch & process them; note
291 * time of last activity type for each port; set_line_char now
292 * supports more than line 0 and treats 0 baud correctly;
293 * get_modem_info senses rs_status;
294 *
295 * Revision 1.36.4.16 1996/07/20 08:43:15 bentson
296 * barely works--now's time to turn on
297 * more features 'til it breaks
298 *
299 * Revision 1.36.4.15 1996/07/19 22:30:06 bentson
300 * check more -Z board status; shorten boot message
301 *
302 * Revision 1.36.4.14 1996/07/19 22:20:37 bentson
303 * fix reference to ch_ctrl in startup; verify return
304 * values from cyz_issue_cmd and cyz_update_channel;
305 * more stuff to get modem control correct;
306 *
307 * Revision 1.36.4.13 1996/07/11 19:53:33 bentson
308 * more -Z stuff folded in; re-order changes to put -Z stuff
309 * after -Y stuff (to make changes clearer)
310 *
311 * Revision 1.36.4.12 1996/07/11 15:40:55 bentson
312 * Add code to poll Cyclades-Z. Add code to get & set RS-232 control.
313 * Add code to send break. Clear firmware ID word at startup (so
314 * that other code won't talk to inactive board).
315 *
316 * Revision 1.36.4.11 1996/07/09 05:28:29 bentson
317 * add code for -Z in set_line_char
318 *
319 * Revision 1.36.4.10 1996/07/08 19:28:37 bentson
320 * fold more -Z stuff (or in some cases, error messages)
321 * into driver; add text to "don't know what to do" messages.
322 *
323 * Revision 1.36.4.9 1996/07/08 18:38:38 bentson
324 * moved compile-time flags near top of file; cosmetic changes
325 * to narrow text (to allow 2-up printing); changed many declarations
326 * to "static" to limit external symbols; shuffled code order to
327 * coalesce -Y and -Z specific code, also to put internal functions
328 * in order of tty_driver structure; added code to recognize -Z
329 * ports (and for moment, do nothing or report error); add cy_startup
330 * to parse boot command line for extra base addresses for ISA probes;
331 *
332 * Revision 1.36.4.8 1996/06/25 17:40:19 bentson
333 * reorder some code, fix types of some vars (int vs. long),
334 * add cy_setup to support user declared ISA addresses
335 *
336 * Revision 1.36.4.7 1996/06/21 23:06:18 bentson
337 * dump ioctl based firmware load (it's now a user level
338 * program); ensure uninitialzed ports cannot be used
339 *
340 * Revision 1.36.4.6 1996/06/20 23:17:19 bentson
341 * rename vars and restructure some code
342 *
343 * Revision 1.36.4.5 1996/06/14 15:09:44 bentson
344 * get right status back after boot load
345 *
346 * Revision 1.36.4.4 1996/06/13 19:51:44 bentson
347 * successfully loads firmware
348 *
349 * Revision 1.36.4.3 1996/06/13 06:08:33 bentson
350 * add more of the code for the boot/load ioctls
351 *
352 * Revision 1.36.4.2 1996/06/11 21:00:51 bentson
353 * start to add Z functionality--starting with ioctl
354 * for loading firmware
355 *
356 * Revision 1.36.4.1 1996/06/10 18:03:02 bentson
357 * added code to recognize Z/PCI card at initialization; report
358 * presence, but card is not initialized (because firmware needs
359 * to be loaded)
360 *
361 * Revision 1.36.3.8 1996/06/07 16:29:00 bentson
362 * starting minor number at zero; added missing verify_area
363 * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
364 *
365 * Revision 1.36.3.7 1996/04/19 21:06:18 bentson
366 * remove unneeded boot message & fix CLOCAL hardware flow
367 * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
368 * remove unused diagnostic statements; minor 0 is first;
369 *
370 * Revision 1.36.3.6 1996/03/13 13:21:17 marcio
371 * The kernel function vremap (available only in later 1.3.xx kernels)
372 * allows the access to memory addresses above the RAM. This revision
373 * of the driver supports PCI boards below 1Mb (device id 0x100) and
374 * above 1Mb (device id 0x101).
375 *
376 * Revision 1.36.3.5 1996/03/07 15:20:17 bentson
377 * Some global changes to interrupt handling spilled into
378 * this driver--mostly unused arguments in system function
379 * calls. Also added change by Marcio Saito which should
380 * reduce lost interrupts at startup by fast processors.
381 *
382 * Revision 1.36.3.4 1995/11/13 20:45:10 bentson
383 * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
384 * in 1.3.41 kernel to remove a possible race condition, extend
385 * some error messages, and let the driver run as a loadable module
386 * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
387 * possible race condition.
388 * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
389 *
390 * Revision 1.36.3.3 1995/11/13 19:44:48 bentson
391 * Changes by Linus Torvalds in 1.3.33 kernel distribution
392 * required due to reordering of driver initialization.
393 * Drivers are now initialized *after* memory management.
394 *
395 * Revision 1.36.3.2 1995/09/08 22:07:14 bentson
396 * remove printk from ISR; fix typo
397 *
398 * Revision 1.36.3.1 1995/09/01 12:00:42 marcio
399 * Minor fixes in the PCI board support. PCI function calls in
400 * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
401 * <duncan@okay.com>. "bad serial count" message removed.
402 *
403 * Revision 1.36.3 1995/08/22 09:19:42 marcio
404 * Cyclom-Y/PCI support added. Changes in the cy_init routine and
405 * board initialization. Changes in the boot messages. The driver
406 * supports up to 4 boards and 64 ports by default.
407 *
408 * Revision 1.36.1.4 1995/03/29 06:14:14 bentson
409 * disambiguate between Cyclom-16Y and Cyclom-32Ye;
410 *
411 * Revision 1.36.1.3 1995/03/23 22:15:35 bentson
412 * add missing break in modem control block in ioctl switch statement
413 * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
414 *
415 * Revision 1.36.1.2 1995/03/22 19:16:22 bentson
416 * make sure CTS flow control is set as soon as possible (thanks
417 * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
418 *
419 * Revision 1.36.1.1 1995/03/13 15:44:43 bentson
420 * initialize defaults for receive threshold and stale data timeout;
421 * cosmetic changes;
422 *
423 * Revision 1.36 1995/03/10 23:33:53 bentson
424 * added support of chips 4-7 in 32 port Cyclom-Ye;
425 * fix cy_interrupt pointer dereference problem
426 * (Joe Portman <baron@aa.net>);
427 * give better error response if open is attempted on non-existent port
428 * (Zachariah Vaum <jchryslr@netcom.com>);
429 * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
430 * conditional compilation for -16Y on systems with fast, noisy bus;
431 * comment out diagnostic print function;
432 * cleaned up table of base addresses;
433 * set receiver time-out period register to correct value,
434 * set receive threshold to better default values,
435 * set chip timer to more accurate 200 Hz ticking,
436 * add code to monitor and modify receive parameters
437 * (Rik Faith <faith@cs.unc.edu> Nick Simicich
438 * <njs@scifi.emi.net>);
439 *
440 * Revision 1.35 1994/12/16 13:54:18 steffen
441 * additional patch by Marcio Saito for board detection
442 * Accidently left out in 1.34
443 *
444 * Revision 1.34 1994/12/10 12:37:12 steffen
445 * This is the corrected version as suggested by Marcio Saito
446 *
447 * Revision 1.33 1994/12/01 22:41:18 bentson
448 * add hooks to support more high speeds directly; add tytso
449 * patch regarding CLOCAL wakeups
450 *
451 * Revision 1.32 1994/11/23 19:50:04 bentson
452 * allow direct kernel control of higher signalling rates;
453 * look for cards at additional locations
454 *
455 * Revision 1.31 1994/11/16 04:33:28 bentson
456 * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
457 * a problem in chars_in_buffer has been resolved by some
458 * small changes; this should yield smoother output
459 *
460 * Revision 1.30 1994/11/16 04:28:05 bentson
461 * Fix from Corey Minyard, Internet: minyard@metronet.com,
462 * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
463 * cy_hangup that appears to clear up much (all?) of the
464 * DTR glitches; also he's added/cleaned-up diagnostic messages
465 *
466 * Revision 1.29 1994/11/16 04:16:07 bentson
467 * add change proposed by Ralph Sims, ralphs@halcyon.com, to
468 * operate higher speeds in same way as other serial ports;
469 * add more serial ports (for up to two 16-port muxes).
470 *
471 * Revision 1.28 1994/11/04 00:13:16 root
472 * turn off diagnostic messages
473 *
474 * Revision 1.27 1994/11/03 23:46:37 root
475 * bunch of changes to bring driver into greater conformance
476 * with the serial.c driver (looking for missed fixes)
477 *
478 * Revision 1.26 1994/11/03 22:40:36 root
479 * automatic interrupt probing fixed.
480 *
481 * Revision 1.25 1994/11/03 20:17:02 root
482 * start to implement auto-irq
483 *
484 * Revision 1.24 1994/11/03 18:01:55 root
485 * still working on modem signals--trying not to drop DTR
486 * during the getty/login processes
487 *
488 * Revision 1.23 1994/11/03 17:51:36 root
489 * extend baud rate support; set receive threshold as function
490 * of baud rate; fix some problems with RTS/CTS;
491 *
492 * Revision 1.22 1994/11/02 18:05:35 root
493 * changed arguments to udelay to type long to get
494 * delays to be of correct duration
495 *
496 * Revision 1.21 1994/11/02 17:37:30 root
497 * employ udelay (after calibrating loops_per_second earlier
498 * in init/main.c) instead of using home-grown delay routines
499 *
500 * Revision 1.20 1994/11/02 03:11:38 root
501 * cy_chars_in_buffer forces a return value of 0 to let
502 * login work (don't know why it does); some functions
503 * that were returning EFAULT, now executes the code;
504 * more work on deciding when to disable xmit interrupts;
505 *
506 * Revision 1.19 1994/11/01 20:10:14 root
507 * define routine to start transmission interrupts (by enabling
508 * transmit interrupts); directly enable/disable modem interrupts;
509 *
510 * Revision 1.18 1994/11/01 18:40:45 bentson
511 * Don't always enable transmit interrupts in startup; interrupt on
512 * TxMpty instead of TxRdy to help characters get out before shutdown;
513 * restructure xmit interrupt to check for chars first and quit if
514 * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
515 * (to my view);
516 *
517 * Revision 1.17 1994/10/30 04:39:45 bentson
518 * rename serial_driver and callout_driver to cy_serial_driver and
519 * cy_callout_driver to avoid linkage interference; initialize
520 * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
521 * from cyclades_port structure; add paranoia check to cy_close;
522 *
523 * Revision 1.16 1994/10/30 01:14:33 bentson
524 * change major numbers; add some _early_ return statements;
525 *
526 * Revision 1.15 1994/10/29 06:43:15 bentson
527 * final tidying up for clean compile; enable some error reporting
528 *
529 * Revision 1.14 1994/10/28 20:30:22 Bentson
530 * lots of changes to drag the driver towards the new tty_io
531 * structures and operation. not expected to work, but may
532 * compile cleanly.
533 *
534 * Revision 1.13 1994/07/21 23:08:57 Bentson
535 * add some diagnostic cruft; support 24 lines (for testing
536 * both -8Y and -16Y cards; be more thorough in servicing all
537 * chips during interrupt; add "volatile" a few places to
538 * circumvent compiler optimizations; fix base & offset
539 * computations in block_til_ready (was causing chip 0 to
540 * stop operation)
541 *
542 * Revision 1.12 1994/07/19 16:42:11 Bentson
543 * add some hackery for kernel version 1.1.8; expand
544 * error messages; refine timing for delay loops and
545 * declare loop params volatile
546 *
547 * Revision 1.11 1994/06/11 21:53:10 bentson
548 * get use of save_car right in transmit interrupt service
549 *
550 * Revision 1.10.1.1 1994/06/11 21:31:18 bentson
551 * add some diagnostic printing; try to fix save_car stuff
552 *
553 * Revision 1.10 1994/06/11 20:36:08 bentson
554 * clean up compiler warnings
555 *
556 * Revision 1.9 1994/06/11 19:42:46 bentson
557 * added a bunch of code to support modem signalling
558 *
559 * Revision 1.8 1994/06/11 17:57:07 bentson
560 * recognize break & parity error
561 *
562 * Revision 1.7 1994/06/05 05:51:34 bentson
563 * Reorder baud table to be monotonic; add cli to CP; discard
564 * incoming characters and status if the line isn't open; start to
565 * fold code into cy_throttle; start to port get_serial_info,
566 * set_serial_info, get_modem_info, set_modem_info, and send_break
567 * from serial.c; expand cy_ioctl; relocate and expand config_setup;
568 * get flow control characters from tty struct; invalidate ports w/o
569 * hardware;
570 *
571 * Revision 1.6 1994/05/31 18:42:21 bentson
572 * add a loop-breaker in the interrupt service routine;
573 * note when port is initialized so that it can be shut
574 * down under the right conditions; receive works without
575 * any obvious errors
576 *
577 * Revision 1.5 1994/05/30 00:55:02 bentson
578 * transmit works without obvious errors
579 *
580 * Revision 1.4 1994/05/27 18:46:27 bentson
581 * incorporated more code from lib_y.c; can now print short
582 * strings under interrupt control to port zero; seems to
583 * select ports/channels/lines correctly
584 *
585 * Revision 1.3 1994/05/25 22:12:44 bentson
586 * shifting from multi-port on a card to proper multiplexor
587 * data structures; added skeletons of most routines
588 *
589 * Revision 1.2 1994/05/19 13:21:43 bentson
590 * start to crib from other sources
591 *
592 */
593
096dcfce
JS		 594#define CY_VERSION "2.4"
595
1da177e4
LT		 596/* If you need to install more boards than NR_CARDS, change the constant
597 in the definition below. No other change is necessary to support up to
598 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
599
02f1175c 600#define NR_CARDS 4
1da177e4
LT		 601
602/*
603 If the total number of ports is larger than NR_PORTS, change this
604 constant in the definition below. No other change is necessary to
605 support more boards/ports. */
606
02f1175c 607#define NR_PORTS 256
1da177e4
LT		 608
609#define ZE_V1_NPORTS 64
610#define ZO_V1 0
611#define ZO_V2 1
612#define ZE_V1 2
613
614#define SERIAL_PARANOIA_CHECK
615#undef CY_DEBUG_OPEN
616#undef CY_DEBUG_THROTTLE
617#undef CY_DEBUG_OTHER
618#undef CY_DEBUG_IO
619#undef CY_DEBUG_COUNT
620#undef CY_DEBUG_DTR
621#undef CY_DEBUG_WAIT_UNTIL_SENT
622#undef CY_DEBUG_INTERRUPTS
623#undef CY_16Y_HACK
624#undef CY_ENABLE_MONITORING
625#undef CY_PCI_DEBUG
626
627#if 0
096dcfce 628#define PAUSE __asm__("nop")
1da177e4 629#else
096dcfce 630#define PAUSE do {} while (0)
1da177e4
LT		 631#endif
632
633/*
634 * Include section
635 */
1da177e4
LT		 636#include <linux/module.h>
637#include <linux/errno.h>
638#include <linux/signal.h>
639#include <linux/sched.h>
640#include <linux/timer.h>
641#include <linux/interrupt.h>
642#include <linux/tty.h>
33f0f88f 643#include <linux/tty_flip.h>
1da177e4
LT		 644#include <linux/serial.h>
645#include <linux/major.h>
646#include <linux/string.h>
647#include <linux/fcntl.h>
648#include <linux/ptrace.h>
649#include <linux/cyclades.h>
650#include <linux/mm.h>
651#include <linux/ioport.h>
652#include <linux/init.h>
653#include <linux/delay.h>
654#include <linux/spinlock.h>
655#include <linux/bitops.h>
656
657#include <asm/system.h>
658#include <asm/io.h>
659#include <asm/irq.h>
660#include <asm/uaccess.h>
661
662#define CY_LOCK(info,flags) \
663 do { \
664 spin_lock_irqsave(&cy_card[info->card].card_lock, flags); \
665 } while (0)
02f1175c 666
1da177e4
LT		 667#define CY_UNLOCK(info,flags) \
668 do { \
669 spin_unlock_irqrestore(&cy_card[info->card].card_lock, flags); \
670 } while (0)
671
672#include <linux/types.h>
673#include <linux/kernel.h>
674#include <linux/pci.h>
675
676#include <linux/stat.h>
677#include <linux/proc_fs.h>
678
02f1175c
JS		 679static void cy_throttle(struct tty_struct *tty);
680static void cy_send_xchar(struct tty_struct *tty, char ch);
1da177e4
LT		 681
682#define IS_CYC_Z(card) ((card).num_chips == -1)
683
684#define Z_FPGA_CHECK(card) \
02f1175c
JS		 685 ((cy_readl(&((struct RUNTIME_9060 __iomem *) \
686 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
1da177e4
LT		 687
688#define ISZLOADED(card) (((ZO_V1==cy_readl(&((struct RUNTIME_9060 __iomem *) \
689 ((card).ctl_addr))->mail_box_0)) || \
690 Z_FPGA_CHECK(card)) && \
691 (ZFIRM_ID==cy_readl(&((struct FIRM_ID __iomem *) \
692 ((card).base_addr+ID_ADDRESS))->signature)))
693
694#ifndef SERIAL_XMIT_SIZE
695#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
696#endif
697#define WAKEUP_CHARS 256
698
699#define STD_COM_FLAGS (0)
700
1da177e4
LT		 701static struct tty_driver *cy_serial_driver;
702
703#ifdef CONFIG_ISA
704/* This is the address lookup table. The driver will probe for
705 Cyclom-Y/ISA boards at all addresses in here. If you want the
706 driver to probe addresses at a different address, add it to
707 this table. If the driver is probing some other board and
708 causing problems, remove the offending address from this table.
709 The cy_setup function extracts additional addresses from the
710 boot options line. The form is "cyclades=address,address..."
711*/
712
713static unsigned int cy_isa_addresses[] = {
02f1175c
JS		 714 0xD0000,
715 0xD2000,
716 0xD4000,
717 0xD6000,
718 0xD8000,
719 0xDA000,
720 0xDC000,
721 0xDE000,
722 0, 0, 0, 0, 0, 0, 0, 0
1da177e4 723};
02f1175c 724
fe971071 725#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
1da177e4
LT		 726
727#ifdef MODULE
728static long maddr[NR_CARDS] = { 0, };
02f1175c 729static int irq[NR_CARDS] = { 0, };
1da177e4
LT		 730
731module_param_array(maddr, long, NULL, 0);
732module_param_array(irq, int, NULL, 0);
733#endif
734
02f1175c 735#endif /* CONFIG_ISA */
1da177e4
LT		 736
737/* This is the per-card data structure containing address, irq, number of
738 channels, etc. This driver supports a maximum of NR_CARDS cards.
739*/
740static struct cyclades_card cy_card[NR_CARDS];
741
742/* This is the per-channel data structure containing pointers, flags
743 and variables for the port. This driver supports a maximum of NR_PORTS.
744*/
745static struct cyclades_port cy_port[NR_PORTS];
746
02f1175c 747static int cy_next_channel; /* next minor available */
1da177e4 748
1da177e4
LT		 749/*
750 * This is used to look up the divisor speeds and the timeouts
751 * We're normally limited to 15 distinct baud rates. The extra
752 * are accessed via settings in info->flags.
753 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
754 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
755 * HI VHI
756 * 20
757 */
758static int baud_table[] = {
02f1175c
JS		 759 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
760 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
761 230400, 0
762};
763
764static char baud_co_25[] = { /* 25 MHz clock option table */
765 /* value => 00 01 02 03 04 */
766 /* divide by 8 32 128 512 2048 */
767 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
768 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
769};
770
771static char baud_bpr_25[] = { /* 25 MHz baud rate period table */
772 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
773 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
774};
775
776static char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
777 /* value => 00 01 02 03 04 */
778 /* divide by 8 32 128 512 2048 */
779 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
780 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
781 0x00
782};
783
784static char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
785 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
786 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
787 0x21
788};
789
790static char baud_cor3[] = { /* receive threshold */
791 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
792 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
793 0x07
794};
1da177e4
LT		 795
796/*
797 * The Cyclades driver implements HW flow control as any serial driver.
798 * The cyclades_port structure member rflow and the vector rflow_thr
799 * allows us to take advantage of a special feature in the CD1400 to avoid
800 * data loss even when the system interrupt latency is too high. These flags
801 * are to be used only with very special applications. Setting these flags
802 * requires the use of a special cable (DTR and RTS reversed). In the new
803 * CD1400-based boards (rev. 6.00 or later), there is no need for special
804 * cables.
805 */
806
02f1175c
JS		 807static char rflow_thr[] = { /* rflow threshold */
808 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
809 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
810 0x0a
811};
1da177e4
LT		 812
813/* The Cyclom-Ye has placed the sequential chips in non-sequential
814 * address order. This look-up table overcomes that problem.
815 */
02f1175c
JS		 816static int cy_chip_offset[] = { 0x0000,
817 0x0400,
818 0x0800,
819 0x0C00,
820 0x0200,
821 0x0600,
822 0x0A00,
823 0x0E00
824};
1da177e4
LT		 825
826/* PCI related definitions */
827
02f1175c
JS		 828static unsigned short cy_pci_nboard;
829static unsigned short cy_isa_nboard;
830static unsigned short cy_nboard;
1da177e4 831#ifdef CONFIG_PCI
02f1175c
JS		 832static unsigned short cy_pci_dev_id[] = {
833 PCI_DEVICE_ID_CYCLOM_Y_Lo, /* PCI < 1Mb */
834 PCI_DEVICE_ID_CYCLOM_Y_Hi, /* PCI > 1Mb */
835 PCI_DEVICE_ID_CYCLOM_4Y_Lo, /* 4Y PCI < 1Mb */
836 PCI_DEVICE_ID_CYCLOM_4Y_Hi, /* 4Y PCI > 1Mb */
837 PCI_DEVICE_ID_CYCLOM_8Y_Lo, /* 8Y PCI < 1Mb */
838 PCI_DEVICE_ID_CYCLOM_8Y_Hi, /* 8Y PCI > 1Mb */
839 PCI_DEVICE_ID_CYCLOM_Z_Lo, /* Z PCI < 1Mb */
840 PCI_DEVICE_ID_CYCLOM_Z_Hi, /* Z PCI > 1Mb */
841 0 /* end of table */
842};
1da177e4
LT		 843#endif
844
845static void cy_start(struct tty_struct *);
846static void set_line_char(struct cyclades_port *);
847static int cyz_issue_cmd(struct cyclades_card *, uclong, ucchar, uclong);
848#ifdef CONFIG_ISA
849static unsigned detect_isa_irq(void __iomem *);
02f1175c 850#endif /* CONFIG_ISA */
1da177e4 851
02f1175c 852static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
1da177e4
LT		 853
854#ifndef CONFIG_CYZ_INTR
855static void cyz_poll(unsigned long);
856
857/* The Cyclades-Z polling cycle is defined by this variable */
858static long cyz_polling_cycle = CZ_DEF_POLL;
859
860static int cyz_timeron = 0;
8d06afab 861static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
1da177e4 862
02f1175c 863#else /* CONFIG_CYZ_INTR */
1da177e4
LT		 864static void cyz_rx_restart(unsigned long);
865static struct timer_list cyz_rx_full_timer[NR_PORTS];
02f1175c 866#endif /* CONFIG_CYZ_INTR */
1da177e4 867
02f1175c
JS		 868static inline int serial_paranoia_check(struct cyclades_port *info,
869 char *name, const char *routine)
1da177e4
LT		 870{
871#ifdef SERIAL_PARANOIA_CHECK
02f1175c 872 if (!info) {
096dcfce
JS		 873 printk("cyc Warning: null cyclades_port for (%s) in %s\n",
874 name, routine);
02f1175c
JS		 875 return 1;
876 }
877
878 if ((long)info < (long)(&cy_port[0]) ||
879 (long)(&cy_port[NR_PORTS]) < (long)info) {
096dcfce
JS		 880 printk("cyc Warning: cyclades_port out of range for (%s) in "
881 "%s\n", name, routine);
02f1175c
JS		 882 return 1;
883 }
884
885 if (info->magic != CYCLADES_MAGIC) {
096dcfce
JS		 886 printk("cyc Warning: bad magic number for serial struct (%s) "
887 "in %s\n", name, routine);
02f1175c
JS		 888 return 1;
889 }
1da177e4 890#endif
02f1175c
JS		 891 return 0;
892} /* serial_paranoia_check */
1da177e4
LT		 893
894/*
895 * This routine is used by the interrupt handler to schedule
896 * processing in the software interrupt portion of the driver
897 * (also known as the "bottom half"). This can be called any
898 * number of times for any channel without harm.
899 */
02f1175c 900static inline void cy_sched_event(struct cyclades_port *info, int event)
1da177e4 901{
02f1175c
JS		 902 info->event |= 1 << event; /* remember what kind of event and who */
903 schedule_work(&info->tqueue);
904} /* cy_sched_event */
1da177e4
LT		 905
906/*
907 * This routine is used to handle the "bottom half" processing for the
908 * serial driver, known also the "software interrupt" processing.
909 * This processing is done at the kernel interrupt level, after the
910 * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
911 * is where time-consuming activities which can not be done in the
912 * interrupt driver proper are done; the interrupt driver schedules
913 * them using cy_sched_event(), and they get done here.
914 *
915 * This is done through one level of indirection--the task queue.
916 * When a hardware interrupt service routine wants service by the
917 * driver's bottom half, it enqueues the appropriate tq_struct (one
918 * per port) to the keventd work queue and sets a request flag
919 * that the work queue be processed.
920 *
921 * Although this may seem unwieldy, it gives the system a way to
922 * pass an argument (in this case the pointer to the cyclades_port
923 * structure) to the bottom half of the driver. Previous kernels
924 * had to poll every port to see if that port needed servicing.
925 */
926static void
c4028958 927do_softint(struct work_struct *work)
1da177e4 928{
c4028958
DH		 929 struct cyclades_port *info =
930 container_of(work, struct cyclades_port, tqueue);
02f1175c
JS		 931 struct tty_struct *tty;
932
933 tty = info->tty;
934 if (!tty)
935 return;
936
937 if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
938 tty_hangup(info->tty);
939 wake_up_interruptible(&info->open_wait);
940 info->flags &= ~ASYNC_NORMAL_ACTIVE;
941 }
942 if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
943 wake_up_interruptible(&info->open_wait);
1da177e4 944#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 945 if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
946 if (cyz_rx_full_timer[info->line].function == NULL) {
947 cyz_rx_full_timer[info->line].expires = jiffies + 1;
948 cyz_rx_full_timer[info->line].function = cyz_rx_restart;
949 cyz_rx_full_timer[info->line].data =
950 (unsigned long)info;
951 add_timer(&cyz_rx_full_timer[info->line]);
952 }
1da177e4 953 }
1da177e4 954#endif
02f1175c
JS		 955 if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
956 wake_up_interruptible(&info->delta_msr_wait);
957 tty_wakeup(tty);
1da177e4 958#ifdef Z_WAKE
02f1175c
JS		 959 if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
960 wake_up_interruptible(&info->shutdown_wait);
1da177e4
LT		 961#endif
962} /* do_softint */
963
964
965/***********************************************************/
966/********* Start of block of Cyclom-Y specific code ********/
967
968/* This routine waits up to 1000 micro-seconds for the previous
969 command to the Cirrus chip to complete and then issues the
970 new command. An error is returned if the previous command
971 didn't finish within the time limit.
972
973 This function is only called from inside spinlock-protected code.
974 */
02f1175c 975static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
1da177e4 976{
02f1175c 977 volatile int i;
1da177e4 978
02f1175c
JS		 979 /* Check to see that the previous command has completed */
980 for (i = 0; i < 100; i++) {
981 if (cy_readb(base_addr + (CyCCR << index)) == 0) {
982 break;
983 }
984 udelay(10L);
1da177e4 985 }
02f1175c
JS		 986 /* if the CCR never cleared, the previous command
987 didn't finish within the "reasonable time" */
988 if (i == 100)
096dcfce 989 return -1;
1da177e4 990
02f1175c
JS		 991 /* Issue the new command */
992 cy_writeb(base_addr + (CyCCR << index), cmd);
1da177e4 993
096dcfce 994 return 0;
02f1175c 995} /* cyy_issue_cmd */
1da177e4
LT		 996
997#ifdef CONFIG_ISA
998/* ISA interrupt detection code */
02f1175c 999static unsigned detect_isa_irq(void __iomem * address)
1da177e4 1000{
02f1175c
JS		 1001 int irq;
1002 unsigned long irqs, flags;
1003 int save_xir, save_car;
1004 int index = 0; /* IRQ probing is only for ISA */
1005
1006 /* forget possible initially masked and pending IRQ */
1007 irq = probe_irq_off(probe_irq_on());
1008
1009 /* Clear interrupts on the board first */
1010 cy_writeb(address + (Cy_ClrIntr << index), 0);
1011 /* Cy_ClrIntr is 0x1800 */
1012
1013 irqs = probe_irq_on();
1014 /* Wait ... */
1015 udelay(5000L);
1016
1017 /* Enable the Tx interrupts on the CD1400 */
1018 local_irq_save(flags);
1019 cy_writeb(address + (CyCAR << index), 0);
1020 cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1021
1022 cy_writeb(address + (CyCAR << index), 0);
1023 cy_writeb(address + (CySRER << index),
1024 cy_readb(address + (CySRER << index)) | CyTxRdy);
1025 local_irq_restore(flags);
1026
1027 /* Wait ... */
1028 udelay(5000L);
1029
1030 /* Check which interrupt is in use */
1031 irq = probe_irq_off(irqs);
1032
1033 /* Clean up */
1034 save_xir = (u_char) cy_readb(address + (CyTIR << index));
1035 save_car = cy_readb(address + (CyCAR << index));
1036 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1037 cy_writeb(address + (CySRER << index),
1038 cy_readb(address + (CySRER << index)) & ~CyTxRdy);
1039 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1040 cy_writeb(address + (CyCAR << index), (save_car));
1041 cy_writeb(address + (Cy_ClrIntr << index), 0);
1042 /* Cy_ClrIntr is 0x1800 */
1043
1044 return (irq > 0) ? irq : 0;
1da177e4 1045}
02f1175c 1046#endif /* CONFIG_ISA */
1da177e4 1047
e941027f 1048static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
02f1175c 1049 void __iomem * base_addr, int status, int index)
e941027f
JS		 1050{
1051 struct cyclades_port *info;
1052 struct tty_struct *tty;
1053 volatile int char_count;
1054 int i, j, len, mdm_change, mdm_status, outch;
1055 int save_xir, channel, save_car;
1056 char data;
1057
02f1175c 1058 if (status & CySRReceive) { /* reception interrupt */
e941027f 1059#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1060 printk("cyy_interrupt: rcvd intr, chip %d\n\r", chip);
e941027f 1061#endif
02f1175c
JS		 1062 /* determine the channel & change to that context */
1063 spin_lock(&cinfo->card_lock);
1064 save_xir = (u_char) cy_readb(base_addr + (CyRIR << index));
1065 channel = (u_short) (save_xir & CyIRChannel);
1066 i = channel + chip * 4 + cinfo->first_line;
1067 info = &cy_port[i];
1068 info->last_active = jiffies;
1069 save_car = cy_readb(base_addr + (CyCAR << index));
1070 cy_writeb(base_addr + (CyCAR << index), save_xir);
1071
1072 /* if there is nowhere to put the data, discard it */
1073 if (info->tty == 0) {
1074 j = (cy_readb(base_addr + (CyRIVR << index)) &
1075 CyIVRMask);
1076 if (j == CyIVRRxEx) { /* exception */
1077 data = cy_readb(base_addr + (CyRDSR << index));
1078 } else { /* normal character reception */
1079 char_count = cy_readb(base_addr +
1080 (CyRDCR << index));
1081 while (char_count--) {
1082 data = cy_readb(base_addr +
1083 (CyRDSR << index));
e941027f 1084 }
e941027f 1085 }
02f1175c
JS		 1086 } else { /* there is an open port for this data */
1087 tty = info->tty;
1088 j = (cy_readb(base_addr + (CyRIVR << index)) &
1089 CyIVRMask);
1090 if (j == CyIVRRxEx) { /* exception */
1091 data = cy_readb(base_addr + (CyRDSR << index));
1092
1093 /* For statistics only */
1094 if (data & CyBREAK)
1095 info->icount.brk++;
1096 else if (data & CyFRAME)
1097 info->icount.frame++;
1098 else if (data & CyPARITY)
1099 info->icount.parity++;
1100 else if (data & CyOVERRUN)
1101 info->icount.overrun++;
1102
1103 if (data & info->ignore_status_mask) {
1104 info->icount.rx++;
1105 return;
1106 }
1107 if (tty_buffer_request_room(tty, 1)) {
1108 if (data & info->read_status_mask) {
1109 if (data & CyBREAK) {
1110 tty_insert_flip_char(
1111 tty,
1112 cy_readb(
1113 base_addr +
1114 (CyRDSR <<
1115 index)),
1116 TTY_BREAK);
1117 info->icount.rx++;
1118 if (info->flags &
1119 ASYNC_SAK) {
1120 do_SAK(tty);
1121 }
1122 } else if (data & CyFRAME) {
1123 tty_insert_flip_char(
1124 tty,
1125 cy_readb(
1126 base_addr +
1127 (CyRDSR <<
1128 index)),
1129 TTY_FRAME);
1130 info->icount.rx++;
1131 info->idle_stats.
1132 frame_errs++;
1133 } else if (data & CyPARITY) {
1134 /* Pieces of seven... */
1135 tty_insert_flip_char(
1136 tty,
1137 cy_readb(
1138 base_addr +
1139 (CyRDSR <<
1140 index)),
1141 TTY_PARITY);
1142 info->icount.rx++;
1143 info->idle_stats.
1144 parity_errs++;
1145 } else if (data & CyOVERRUN) {
1146 tty_insert_flip_char(
1147 tty, 0,
1148 TTY_OVERRUN);
1149 info->icount.rx++;
1150 /* If the flip buffer itself is
1151 overflowing, we still lose
1152 the next incoming character.
1153 */
1154 tty_insert_flip_char(
1155 tty,
1156 cy_readb(
1157 base_addr +
1158 (CyRDSR <<
1159 index)),
1160 TTY_FRAME);
1161 info->icount.rx++;
1162 info->idle_stats.
1163 overruns++;
1164 /* These two conditions may imply */
1165 /* a normal read should be done. */
1166 /* }else if(data & CyTIMEOUT){ */
1167 /* }else if(data & CySPECHAR){ */
1168 } else {
1169 tty_insert_flip_char(
1170 tty, 0,
1171 TTY_NORMAL);
1172 info->icount.rx++;
1173 }
1174 } else {
1175 tty_insert_flip_char(tty, 0,
1176 TTY_NORMAL);
1177 info->icount.rx++;
1178 }
1179 } else {
1180 /* there was a software buffer
1181 overrun and nothing could be
1182 done about it!!! */
1183 info->icount.buf_overrun++;
1184 info->idle_stats.overruns++;
1185 }
1186 } else { /* normal character reception */
1187 /* load # chars available from the chip */
1188 char_count = cy_readb(base_addr +
1189 (CyRDCR << index));
e941027f
JS		 1190
1191#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1192 ++info->mon.int_count;
1193 info->mon.char_count += char_count;
1194 if (char_count > info->mon.char_max)
1195 info->mon.char_max = char_count;
1196 info->mon.char_last = char_count;
e941027f 1197#endif
02f1175c
JS		 1198 len = tty_buffer_request_room(tty, char_count);
1199 while (len--) {
1200 data = cy_readb(base_addr +
1201 (CyRDSR << index));
1202 tty_insert_flip_char(tty, data,
1203 TTY_NORMAL);
1204 info->idle_stats.recv_bytes++;
1205 info->icount.rx++;
e941027f 1206#ifdef CY_16Y_HACK
02f1175c 1207 udelay(10L);
e941027f 1208#endif
02f1175c
JS		 1209 }
1210 info->idle_stats.recv_idle = jiffies;
1211 }
1212 tty_schedule_flip(tty);
e941027f 1213 }
02f1175c
JS		 1214 /* end of service */
1215 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1216 cy_writeb(base_addr + (CyCAR << index), (save_car));
1217 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1218 }
1219
02f1175c
JS		 1220 if (status & CySRTransmit) { /* transmission interrupt */
1221 /* Since we only get here when the transmit buffer
1222 is empty, we know we can always stuff a dozen
1223 characters. */
e941027f 1224#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1225 printk("cyy_interrupt: xmit intr, chip %d\n\r", chip);
e941027f
JS		 1226#endif
1227
02f1175c
JS		 1228 /* determine the channel & change to that context */
1229 spin_lock(&cinfo->card_lock);
1230 save_xir = (u_char) cy_readb(base_addr + (CyTIR << index));
1231 channel = (u_short) (save_xir & CyIRChannel);
1232 i = channel + chip * 4 + cinfo->first_line;
1233 save_car = cy_readb(base_addr + (CyCAR << index));
1234 cy_writeb(base_addr + (CyCAR << index), save_xir);
1235
1236 /* validate the port# (as configured and open) */
1237 if ((i < 0) || (NR_PORTS <= i)) {
1238 cy_writeb(base_addr + (CySRER << index),
1239 cy_readb(base_addr + (CySRER << index)) &
1240 ~CyTxRdy);
1241 goto txend;
e941027f 1242 }
02f1175c
JS		 1243 info = &cy_port[i];
1244 info->last_active = jiffies;
1245 if (info->tty == 0) {
1246 cy_writeb(base_addr + (CySRER << index),
1247 cy_readb(base_addr + (CySRER << index)) &
1248 ~CyTxRdy);
1249 goto txdone;
e941027f 1250 }
02f1175c
JS		 1251
1252 /* load the on-chip space for outbound data */
1253 char_count = info->xmit_fifo_size;
1254
1255 if (info->x_char) { /* send special char */
1256 outch = info->x_char;
1257 cy_writeb(base_addr + (CyTDR << index), outch);
1258 char_count--;
1259 info->icount.tx++;
1260 info->x_char = 0;
e941027f 1261 }
02f1175c
JS		 1262
1263 if (info->breakon || info->breakoff) {
1264 if (info->breakon) {
1265 cy_writeb(base_addr + (CyTDR << index), 0);
1266 cy_writeb(base_addr + (CyTDR << index), 0x81);
1267 info->breakon = 0;
1268 char_count -= 2;
1269 }
1270 if (info->breakoff) {
1271 cy_writeb(base_addr + (CyTDR << index), 0);
1272 cy_writeb(base_addr + (CyTDR << index), 0x83);
1273 info->breakoff = 0;
1274 char_count -= 2;
1275 }
e941027f 1276 }
02f1175c
JS		 1277
1278 while (char_count-- > 0) {
1279 if (!info->xmit_cnt) {
1280 if (cy_readb(base_addr + (CySRER << index)) &
1281 CyTxMpty) {
1282 cy_writeb(base_addr + (CySRER << index),
1283 cy_readb(base_addr +
1284 (CySRER << index)) &
1285 ~CyTxMpty);
1286 } else {
1287 cy_writeb(base_addr + (CySRER << index),
1288 (cy_readb(base_addr +
1289 (CySRER << index)) &
1290 ~CyTxRdy) | CyTxMpty);
1291 }
1292 goto txdone;
1293 }
1294 if (info->xmit_buf == 0) {
1295 cy_writeb(base_addr + (CySRER << index),
1296 cy_readb(base_addr + (CySRER << index))&
1297 ~CyTxRdy);
1298 goto txdone;
1299 }
1300 if (info->tty->stopped || info->tty->hw_stopped) {
1301 cy_writeb(base_addr + (CySRER << index),
1302 cy_readb(base_addr + (CySRER << index))&
1303 ~CyTxRdy);
1304 goto txdone;
1305 }
1306 /* Because the Embedded Transmit Commands have
1307 been enabled, we must check to see if the
1308 escape character, NULL, is being sent. If it
1309 is, we must ensure that there is room for it
1310 to be doubled in the output stream. Therefore
1311 we no longer advance the pointer when the
1312 character is fetched, but rather wait until
1313 after the check for a NULL output character.
1314 This is necessary because there may not be
1315 room for the two chars needed to send a NULL.)
1316 */
1317 outch = info->xmit_buf[info->xmit_tail];
1318 if (outch) {
1319 info->xmit_cnt--;
1320 info->xmit_tail = (info->xmit_tail + 1) &
1321 (SERIAL_XMIT_SIZE - 1);
1322 cy_writeb(base_addr + (CyTDR << index), outch);
1323 info->icount.tx++;
1324 } else {
1325 if (char_count > 1) {
1326 info->xmit_cnt--;
1327 info->xmit_tail = (info->xmit_tail + 1)&
1328 (SERIAL_XMIT_SIZE - 1);
1329 cy_writeb(base_addr + (CyTDR << index),
1330 outch);
1331 cy_writeb(base_addr + (CyTDR << index),
1332 0);
1333 info->icount.tx++;
1334 char_count--;
1335 } else {
1336 }
1337 }
e941027f 1338 }
e941027f
JS		 1339
1340txdone:
02f1175c
JS		 1341 if (info->xmit_cnt < WAKEUP_CHARS) {
1342 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1343 }
e941027f 1344txend:
02f1175c
JS		 1345 /* end of service */
1346 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1347 cy_writeb(base_addr + (CyCAR << index), (save_car));
1348 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1349 }
1350
02f1175c 1351 if (status & CySRModem) { /* modem interrupt */
e941027f 1352
02f1175c
JS		 1353 /* determine the channel & change to that context */
1354 spin_lock(&cinfo->card_lock);
1355 save_xir = (u_char) cy_readb(base_addr + (CyMIR << index));
1356 channel = (u_short) (save_xir & CyIRChannel);
1357 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1358 info->last_active = jiffies;
1359 save_car = cy_readb(base_addr + (CyCAR << index));
1360 cy_writeb(base_addr + (CyCAR << index), save_xir);
1361
1362 mdm_change = cy_readb(base_addr + (CyMISR << index));
1363 mdm_status = cy_readb(base_addr + (CyMSVR1 << index));
1364
1365 if (info->tty == 0) { /* no place for data, ignore it */
1366 ;
1367 } else {
1368 if (mdm_change & CyANY_DELTA) {
1369 /* For statistics only */
1370 if (mdm_change & CyDCD)
1371 info->icount.dcd++;
1372 if (mdm_change & CyCTS)
1373 info->icount.cts++;
1374 if (mdm_change & CyDSR)
1375 info->icount.dsr++;
1376 if (mdm_change & CyRI)
1377 info->icount.rng++;
1378
1379 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
e941027f 1380 }
02f1175c
JS		 1381
1382 if ((mdm_change & CyDCD) &&
1383 (info->flags & ASYNC_CHECK_CD)) {
1384 if (mdm_status & CyDCD) {
1385 cy_sched_event(info,
1386 Cy_EVENT_OPEN_WAKEUP);
1387 } else {
1388 cy_sched_event(info, Cy_EVENT_HANGUP);
1389 }
1390 }
1391 if ((mdm_change & CyCTS) &&
1392 (info->flags & ASYNC_CTS_FLOW)) {
1393 if (info->tty->hw_stopped) {
1394 if (mdm_status & CyCTS) {
1395 /* cy_start isn't used
1396 because... !!! */
1397 info->tty->hw_stopped = 0;
1398 cy_writeb(base_addr +
1399 (CySRER << index),
1400 cy_readb(base_addr +
1401 (CySRER <<
1402 index))|
1403 CyTxRdy);
1404 cy_sched_event(info,
1405 Cy_EVENT_WRITE_WAKEUP);
1406 }
1407 } else {
1408 if (!(mdm_status & CyCTS)) {
1409 /* cy_stop isn't used
1410 because ... !!! */
1411 info->tty->hw_stopped = 1;
1412 cy_writeb(base_addr +
1413 (CySRER << index),
1414 cy_readb(base_addr +
1415 (CySRER <<
1416 index)) &
1417 ~CyTxRdy);
1418 }
1419 }
1420 }
1421 if (mdm_change & CyDSR) {
1422 }
1423 if (mdm_change & CyRI) {
e941027f 1424 }
e941027f 1425 }
02f1175c
JS		 1426 /* end of service */
1427 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1428 cy_writeb(base_addr + (CyCAR << index), save_car);
1429 spin_unlock(&cinfo->card_lock);
e941027f
JS		 1430 }
1431}
1432
1da177e4
LT		 1433/* The real interrupt service routine is called
1434 whenever the card wants its hand held--chars
1435 received, out buffer empty, modem change, etc.
1436 */
02f1175c 1437static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1da177e4 1438{
02f1175c
JS		 1439 int status;
1440 struct cyclades_card *cinfo;
1441 void __iomem *base_addr, *card_base_addr;
1442 int chip;
1443 int index;
1444 int too_many;
1445 int had_work;
1446
1447 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1448#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1449 printk("cyy_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1450#endif
02f1175c
JS		 1451 return IRQ_NONE; /* spurious interrupt */
1452 }
1453
1454 card_base_addr = cinfo->base_addr;
1455 index = cinfo->bus_index;
1456
1457 /* This loop checks all chips in the card. Make a note whenever
1458 _any_ chip had some work to do, as this is considered an
1459 indication that there will be more to do. Only when no chip
1460 has any work does this outermost loop exit.
1461 */
1462 do {
1463 had_work = 0;
1464 for (chip = 0; chip < cinfo->num_chips; chip++) {
1465 base_addr = cinfo->base_addr +
1466 (cy_chip_offset[chip] << index);
1467 too_many = 0;
1468 while ((status = cy_readb(base_addr +
1469 (CySVRR << index))) != 0x00) {
1470 had_work++;
1471 /* The purpose of the following test is to ensure that
1472 no chip can monopolize the driver. This forces the
1473 chips to be checked in a round-robin fashion (after
1474 draining each of a bunch (1000) of characters).
1475 */
1476 if (1000 < too_many++) {
1477 break;
1478 }
1479 cyy_intr_chip(cinfo, chip, base_addr, status,
1480 index);
1481 }
1482 }
1483 } while (had_work);
1484
1485 /* clear interrupts */
1486 spin_lock(&cinfo->card_lock);
1487 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1488 /* Cy_ClrIntr is 0x1800 */
1489 spin_unlock(&cinfo->card_lock);
1490 return IRQ_HANDLED;
1491} /* cyy_interrupt */
1da177e4
LT		 1492
1493/***********************************************************/
1494/********* End of block of Cyclom-Y specific code **********/
1495/******** Start of block of Cyclades-Z specific code *********/
1496/***********************************************************/
1497
1498static int
02f1175c
JS		 1499cyz_fetch_msg(struct cyclades_card *cinfo,
1500 uclong * channel, ucchar * cmd, uclong * param)
1da177e4 1501{
02f1175c
JS		 1502 struct FIRM_ID __iomem *firm_id;
1503 struct ZFW_CTRL __iomem *zfw_ctrl;
1504 struct BOARD_CTRL __iomem *board_ctrl;
1505 unsigned long loc_doorbell;
1506
1507 firm_id = cinfo->base_addr + ID_ADDRESS;
1508 if (!ISZLOADED(*cinfo)) {
096dcfce 1509 return -1;
02f1175c
JS		 1510 }
1511 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1512 0xfffff);
1513 board_ctrl = &zfw_ctrl->board_ctrl;
1514
1515 loc_doorbell = cy_readl(&((struct RUNTIME_9060 __iomem *)
1516 (cinfo->ctl_addr))->loc_doorbell);
1517 if (loc_doorbell) {
1518 *cmd = (char)(0xff & loc_doorbell);
1519 *channel = cy_readl(&board_ctrl->fwcmd_channel);
1520 *param = (uclong) cy_readl(&board_ctrl->fwcmd_param);
1521 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1522 loc_doorbell, 0xffffffff);
1523 return 1;
1524 }
1525 return 0;
1526} /* cyz_fetch_msg */
1da177e4
LT		 1527
1528static int
02f1175c
JS		 1529cyz_issue_cmd(struct cyclades_card *cinfo,
1530 uclong channel, ucchar cmd, uclong param)
1da177e4 1531{
02f1175c
JS		 1532 struct FIRM_ID __iomem *firm_id;
1533 struct ZFW_CTRL __iomem *zfw_ctrl;
1534 struct BOARD_CTRL __iomem *board_ctrl;
1535 unsigned long __iomem *pci_doorbell;
1536 int index;
1537
1538 firm_id = cinfo->base_addr + ID_ADDRESS;
1539 if (!ISZLOADED(*cinfo)) {
096dcfce 1540 return -1;
02f1175c
JS		 1541 }
1542 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1543 0xfffff);
1544 board_ctrl = &zfw_ctrl->board_ctrl;
1545
1546 index = 0;
1547 pci_doorbell =
1548 &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1549 while ((cy_readl(pci_doorbell) & 0xff) != 0) {
1550 if (index++ == 1000) {
096dcfce 1551 return (int)(cy_readl(pci_doorbell) & 0xff);
02f1175c
JS		 1552 }
1553 udelay(50L);
1554 }
1555 cy_writel(&board_ctrl->hcmd_channel, channel);
1556 cy_writel(&board_ctrl->hcmd_param, param);
1557 cy_writel(pci_doorbell, (long)cmd);
1558
096dcfce 1559 return 0;
02f1175c 1560} /* cyz_issue_cmd */
1da177e4
LT		 1561
1562static void
1563cyz_handle_rx(struct cyclades_port *info,
02f1175c
JS		 1564 volatile struct CH_CTRL __iomem * ch_ctrl,
1565 volatile struct BUF_CTRL __iomem * buf_ctrl)
1da177e4 1566{
02f1175c
JS		 1567 struct cyclades_card *cinfo = &cy_card[info->card];
1568 struct tty_struct *tty = info->tty;
1569 volatile int char_count;
1570 int len;
1da177e4 1571#ifdef BLOCKMOVE
02f1175c 1572 int small_count;
1da177e4 1573#else
02f1175c 1574 char data;
1da177e4 1575#endif
02f1175c 1576 volatile uclong rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1da177e4 1577
02f1175c
JS		 1578 rx_get = new_rx_get = cy_readl(&buf_ctrl->rx_get);
1579 rx_put = cy_readl(&buf_ctrl->rx_put);
1580 rx_bufsize = cy_readl(&buf_ctrl->rx_bufsize);
1581 rx_bufaddr = cy_readl(&buf_ctrl->rx_bufaddr);
1582 if (rx_put >= rx_get)
1583 char_count = rx_put - rx_get;
1584 else
1585 char_count = rx_put - rx_get + rx_bufsize;
1da177e4 1586
02f1175c
JS		 1587 if (char_count) {
1588 info->last_active = jiffies;
1589 info->jiffies[1] = jiffies;
1da177e4
LT		 1590
1591#ifdef CY_ENABLE_MONITORING
02f1175c
JS		 1592 info->mon.int_count++;
1593 info->mon.char_count += char_count;
1594 if (char_count > info->mon.char_max)
1595 info->mon.char_max = char_count;
1596 info->mon.char_last = char_count;
1da177e4 1597#endif
02f1175c
JS		 1598 if (tty == 0) {
1599 /* flush received characters */
1600 new_rx_get = (new_rx_get + char_count) &
1601 (rx_bufsize - 1);
1602 info->rflush_count++;
1603 } else {
1da177e4 1604#ifdef BLOCKMOVE
02f1175c
JS		 1605 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1606 for performance, but because of buffer boundaries, there
1607 may be several steps to the operation */
1608 while (0 < (small_count = min_t(unsigned int,
1609 rx_bufsize - new_rx_get,
1610 min_t(unsigned int, TTY_FLIPBUF_SIZE -
1611 tty->flip.count, char_count)))){
1612 memcpy_fromio(tty->flip.char_buf_ptr,
1613 (char *)(cinfo->base_addr + rx_bufaddr +
1614 new_rx_get),
1615 small_count);
1616
1617 tty->flip.char_buf_ptr += small_count;
1618 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1619 small_count);
1620 tty->flip.flag_buf_ptr += small_count;
1621 new_rx_get = (new_rx_get + small_count) &
1622 (rx_bufsize - 1);
1623 char_count -= small_count;
1624 info->icount.rx += small_count;
1625 info->idle_stats.recv_bytes += small_count;
1626 tty->flip.count += small_count;
1627 }
1da177e4 1628#else
02f1175c
JS		 1629 len = tty_buffer_request_room(tty, char_count);
1630 while (len--) {
1631 data = cy_readb(cinfo->base_addr + rx_bufaddr +
1632 new_rx_get);
1633 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1634 tty_insert_flip_char(tty, data, TTY_NORMAL);
1635 info->idle_stats.recv_bytes++;
1636 info->icount.rx++;
1637 }
1da177e4
LT		 1638#endif
1639#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1640 /* Recalculate the number of chars in the RX buffer and issue
1641 a cmd in case it's higher than the RX high water mark */
1642 rx_put = cy_readl(&buf_ctrl->rx_put);
1643 if (rx_put >= rx_get)
1644 char_count = rx_put - rx_get;
1645 else
1646 char_count = rx_put - rx_get + rx_bufsize;
1647 if (char_count >= cy_readl(&buf_ctrl->rx_threshold)) {
1648 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1649 }
1da177e4 1650#endif
02f1175c
JS		 1651 info->idle_stats.recv_idle = jiffies;
1652 tty_schedule_flip(tty);
1653 }
1654 /* Update rx_get */
1655 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1da177e4 1656 }
1da177e4
LT		 1657}
1658
1659static void
1660cyz_handle_tx(struct cyclades_port *info,
02f1175c
JS		 1661 volatile struct CH_CTRL __iomem * ch_ctrl,
1662 volatile struct BUF_CTRL __iomem * buf_ctrl)
1da177e4 1663{
02f1175c
JS		 1664 struct cyclades_card *cinfo = &cy_card[info->card];
1665 struct tty_struct *tty = info->tty;
1666 char data;
1667 volatile int char_count;
1da177e4 1668#ifdef BLOCKMOVE
02f1175c 1669 int small_count;
1da177e4 1670#endif
02f1175c 1671 volatile uclong tx_put, tx_get, tx_bufsize, tx_bufaddr;
1da177e4 1672
02f1175c
JS		 1673 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1674 return;
1da177e4 1675
02f1175c
JS		 1676 tx_get = cy_readl(&buf_ctrl->tx_get);
1677 tx_put = cy_readl(&buf_ctrl->tx_put);
1678 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
1679 tx_bufaddr = cy_readl(&buf_ctrl->tx_bufaddr);
1680 if (tx_put >= tx_get)
1681 char_count = tx_get - tx_put - 1 + tx_bufsize;
1682 else
1683 char_count = tx_get - tx_put - 1;
1da177e4 1684
02f1175c 1685 if (char_count) {
1da177e4 1686
02f1175c
JS		 1687 if (tty == 0) {
1688 goto ztxdone;
1689 }
1da177e4 1690
02f1175c
JS		 1691 if (info->x_char) { /* send special char */
1692 data = info->x_char;
1da177e4 1693
02f1175c
JS		 1694 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1695 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1696 info->x_char = 0;
1697 char_count--;
1698 info->icount.tx++;
1699 info->last_active = jiffies;
1700 info->jiffies[2] = jiffies;
1701 }
1da177e4 1702#ifdef BLOCKMOVE
02f1175c
JS		 1703 while (0 < (small_count = min_t(unsigned int,
1704 tx_bufsize - tx_put, min_t(unsigned int,
1705 (SERIAL_XMIT_SIZE - info->xmit_tail),
1706 min_t(unsigned int, info->xmit_cnt,
1707 char_count))))) {
1708
1709 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1710 tx_put),
1711 &info->xmit_buf[info->xmit_tail],
1712 small_count);
1713
1714 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1715 char_count -= small_count;
1716 info->icount.tx += small_count;
1717 info->xmit_cnt -= small_count;
1718 info->xmit_tail = (info->xmit_tail + small_count) &
1719 (SERIAL_XMIT_SIZE - 1);
1720 info->last_active = jiffies;
1721 info->jiffies[2] = jiffies;
1722 }
1da177e4 1723#else
02f1175c
JS		 1724 while (info->xmit_cnt && char_count) {
1725 data = info->xmit_buf[info->xmit_tail];
1726 info->xmit_cnt--;
1727 info->xmit_tail = (info->xmit_tail + 1) &
1728 (SERIAL_XMIT_SIZE - 1);
1729
1730 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1731 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1732 char_count--;
1733 info->icount.tx++;
1734 info->last_active = jiffies;
1735 info->jiffies[2] = jiffies;
1736 }
1da177e4 1737#endif
02f1175c
JS		 1738ztxdone:
1739 if (info->xmit_cnt < WAKEUP_CHARS) {
1740 cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1741 }
1742 /* Update tx_put */
1743 cy_writel(&buf_ctrl->tx_put, tx_put);
1da177e4 1744 }
1da177e4
LT		 1745}
1746
02f1175c 1747static void cyz_handle_cmd(struct cyclades_card *cinfo)
1da177e4 1748{
02f1175c
JS		 1749 struct tty_struct *tty;
1750 struct cyclades_port *info;
1751 static volatile struct FIRM_ID __iomem *firm_id;
1752 static volatile struct ZFW_CTRL __iomem *zfw_ctrl;
1753 static volatile struct BOARD_CTRL __iomem *board_ctrl;
1754 static volatile struct CH_CTRL __iomem *ch_ctrl;
1755 static volatile struct BUF_CTRL __iomem *buf_ctrl;
1756 uclong channel;
1757 ucchar cmd;
1758 uclong param;
1759 uclong hw_ver, fw_ver;
1760 int special_count;
1761 int delta_count;
1762
1763 firm_id = cinfo->base_addr + ID_ADDRESS;
1764 zfw_ctrl = cinfo->base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
1765 0xfffff);
1766 board_ctrl = &zfw_ctrl->board_ctrl;
1767 fw_ver = cy_readl(&board_ctrl->fw_version);
1768 hw_ver = cy_readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1769 mail_box_0);
1770
1771 while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1772 special_count = 0;
1773 delta_count = 0;
1774 info = &cy_port[channel + cinfo->first_line];
1775 if ((tty = info->tty) == 0) {
1776 continue;
1da177e4 1777 }
02f1175c
JS		 1778 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1779 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1780
1781 switch (cmd) {
1782 case C_CM_PR_ERROR:
1783 tty_insert_flip_char(tty, 0, TTY_PARITY);
1784 info->icount.rx++;
1785 special_count++;
1786 break;
1787 case C_CM_FR_ERROR:
1788 tty_insert_flip_char(tty, 0, TTY_FRAME);
1789 info->icount.rx++;
1790 special_count++;
1791 break;
1792 case C_CM_RXBRK:
1793 tty_insert_flip_char(tty, 0, TTY_BREAK);
1794 info->icount.rx++;
1795 special_count++;
1796 break;
1797 case C_CM_MDCD:
1798 info->icount.dcd++;
1799 delta_count++;
1800 if (info->flags & ASYNC_CHECK_CD) {
1801 if ((fw_ver > 241 ? ((u_long) param) :
1802 cy_readl(&ch_ctrl->rs_status)) &
1803 C_RS_DCD) {
1804 cy_sched_event(info,
1805 Cy_EVENT_OPEN_WAKEUP);
1806 } else {
1807 cy_sched_event(info, Cy_EVENT_HANGUP);
1808 }
1809 }
1810 break;
1811 case C_CM_MCTS:
1812 info->icount.cts++;
1813 delta_count++;
1814 break;
1815 case C_CM_MRI:
1816 info->icount.rng++;
1817 delta_count++;
1818 break;
1819 case C_CM_MDSR:
1820 info->icount.dsr++;
1821 delta_count++;
1822 break;
1da177e4 1823#ifdef Z_WAKE
02f1175c
JS		 1824 case C_CM_IOCTLW:
1825 cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1826 break;
1da177e4
LT		 1827#endif
1828#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 1829 case C_CM_RXHIWM:
1830 case C_CM_RXNNDT:
1831 case C_CM_INTBACK2:
1832 /* Reception Interrupt */
1da177e4 1833#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1834 printk("cyz_interrupt: rcvd intr, card %d, "
1835 "port %ld\n\r", info->card, channel);
1da177e4 1836#endif
02f1175c
JS		 1837 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1838 break;
1839 case C_CM_TXBEMPTY:
1840 case C_CM_TXLOWWM:
1841 case C_CM_INTBACK:
1842 /* Transmission Interrupt */
1da177e4 1843#ifdef CY_DEBUG_INTERRUPTS
02f1175c
JS		 1844 printk("cyz_interrupt: xmit intr, card %d, "
1845 "port %ld\n\r", info->card, channel);
1da177e4 1846#endif
02f1175c
JS		 1847 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1848 break;
1849#endif /* CONFIG_CYZ_INTR */
1850 case C_CM_FATAL:
1851 /* should do something with this !!! */
1852 break;
1853 default:
1854 break;
1855 }
1856 if (delta_count)
1857 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1858 if (special_count)
1859 tty_schedule_flip(tty);
1da177e4 1860 }
1da177e4
LT		 1861}
1862
1863#ifdef CONFIG_CYZ_INTR
02f1175c 1864static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1da177e4 1865{
02f1175c 1866 struct cyclades_card *cinfo;
1da177e4 1867
02f1175c 1868 if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1da177e4 1869#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1870 printk("cyz_interrupt: spurious interrupt %d\n\r", irq);
1da177e4 1871#endif
02f1175c
JS		 1872 return IRQ_NONE; /* spurious interrupt */
1873 }
1da177e4 1874
02f1175c 1875 if (!ISZLOADED(*cinfo)) {
1da177e4 1876#ifdef CY_DEBUG_INTERRUPTS
02f1175c 1877 printk("cyz_interrupt: board not yet loaded (IRQ%d).\n\r", irq);
1da177e4 1878#endif
02f1175c
JS		 1879 return IRQ_NONE;
1880 }
1da177e4 1881
02f1175c
JS		 1882 /* Handle the interrupts */
1883 cyz_handle_cmd(cinfo);
1da177e4 1884
02f1175c
JS		 1885 return IRQ_HANDLED;
1886} /* cyz_interrupt */
1da177e4 1887
02f1175c 1888static void cyz_rx_restart(unsigned long arg)
1da177e4 1889{
02f1175c
JS		 1890 struct cyclades_port *info = (struct cyclades_port *)arg;
1891 int retval;
1892 int card = info->card;
1893 uclong channel = (info->line) - (cy_card[card].first_line);
1894 unsigned long flags;
1895
1896 CY_LOCK(info, flags);
1897 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK2, 0L);
1898 if (retval != 0) {
1899 printk("cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1900 info->line, retval);
1901 }
1902 cyz_rx_full_timer[info->line].function = NULL;
1903 CY_UNLOCK(info, flags);
1da177e4
LT		 1904}
1905
02f1175c 1906#else /* CONFIG_CYZ_INTR */
1da177e4 1907
02f1175c 1908static void cyz_poll(unsigned long arg)
1da177e4 1909{
02f1175c
JS		 1910 struct cyclades_card *cinfo;
1911 struct cyclades_port *info;
1912 struct tty_struct *tty;
1913 static volatile struct FIRM_ID *firm_id;
1914 static volatile struct ZFW_CTRL *zfw_ctrl;
1915 static volatile struct BOARD_CTRL *board_ctrl;
1916 static volatile struct CH_CTRL *ch_ctrl;
1917 static volatile struct BUF_CTRL *buf_ctrl;
1918 int card, port;
1da177e4 1919
02f1175c
JS		 1920 cyz_timerlist.expires = jiffies + (HZ);
1921 for (card = 0; card < NR_CARDS; card++) {
1922 cinfo = &cy_card[card];
1923
1924 if (!IS_CYC_Z(*cinfo))
1925 continue;
1926 if (!ISZLOADED(*cinfo))
1927 continue;
1928
1929 firm_id = cinfo->base_addr + ID_ADDRESS;
1930 zfw_ctrl = cinfo->base_addr +
1931 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
1932 board_ctrl = &(zfw_ctrl->board_ctrl);
1da177e4
LT		 1933
1934 /* Skip first polling cycle to avoid racing conditions with the FW */
02f1175c
JS		 1935 if (!cinfo->intr_enabled) {
1936 cinfo->nports = (int)cy_readl(&board_ctrl->n_channel);
1937 cinfo->intr_enabled = 1;
1938 continue;
1939 }
1da177e4 1940
02f1175c 1941 cyz_handle_cmd(cinfo);
1da177e4 1942
02f1175c
JS		 1943 for (port = 0; port < cinfo->nports; port++) {
1944 info = &cy_port[port + cinfo->first_line];
1945 tty = info->tty;
1946 ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1947 buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1da177e4 1948
02f1175c
JS		 1949 if (!info->throttle)
1950 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1951 cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1952 }
1953 /* poll every 'cyz_polling_cycle' period */
1954 cyz_timerlist.expires = jiffies + cyz_polling_cycle;
1da177e4 1955 }
02f1175c 1956 add_timer(&cyz_timerlist);
02f1175c 1957} /* cyz_poll */
1da177e4 1958
02f1175c 1959#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 1960
1961/********** End of block of Cyclades-Z specific code *********/
1962/***********************************************************/
1963
1da177e4
LT		 1964/* This is called whenever a port becomes active;
1965 interrupts are enabled and DTR & RTS are turned on.
1966 */
02f1175c 1967static int startup(struct cyclades_port *info)
1da177e4 1968{
02f1175c
JS		 1969 unsigned long flags;
1970 int retval = 0;
1971 void __iomem *base_addr;
1972 int card, chip, channel, index;
1973 unsigned long page;
1da177e4 1974
02f1175c
JS		 1975 card = info->card;
1976 channel = (info->line) - (cy_card[card].first_line);
1da177e4 1977
02f1175c
JS		 1978 page = get_zeroed_page(GFP_KERNEL);
1979 if (!page)
1980 return -ENOMEM;
1da177e4 1981
02f1175c 1982 CY_LOCK(info, flags);
1da177e4 1983
02f1175c
JS		 1984 if (info->flags & ASYNC_INITIALIZED) {
1985 free_page(page);
1986 goto errout;
1987 }
1da177e4 1988
02f1175c
JS		 1989 if (!info->type) {
1990 if (info->tty) {
1991 set_bit(TTY_IO_ERROR, &info->tty->flags);
1992 }
1993 free_page(page);
1994 goto errout;
1995 }
1da177e4 1996
02f1175c
JS		 1997 if (info->xmit_buf)
1998 free_page(page);
1999 else
2000 info->xmit_buf = (unsigned char *)page;
1da177e4 2001
02f1175c 2002 CY_UNLOCK(info, flags);
1da177e4 2003
02f1175c 2004 set_line_char(info);
1da177e4 2005
02f1175c
JS		 2006 if (!IS_CYC_Z(cy_card[card])) {
2007 chip = channel >> 2;
2008 channel &= 0x03;
2009 index = cy_card[card].bus_index;
2010 base_addr = cy_card[card].base_addr +
2011 (cy_chip_offset[chip] << index);
1da177e4
LT		 2012
2013#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2014 printk("cyc startup card %d, chip %d, channel %d, "
2015 "base_addr %lx\n",
2016 card, chip, channel, (long)base_addr);
2017 /**/
1da177e4 2018#endif
02f1175c 2019 CY_LOCK(info, flags);
1da177e4 2020
02f1175c 2021 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
1da177e4 2022
02f1175c
JS		 2023 cy_writeb(base_addr + (CyRTPR << index),
2024 (info->default_timeout ? info->default_timeout : 0x02));
2025 /* 10ms rx timeout */
1da177e4 2026
02f1175c
JS		 2027 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2028 index);
1da177e4 2029
02f1175c
JS		 2030 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2031 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2032 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
1da177e4
LT		 2033
2034#ifdef CY_DEBUG_DTR
02f1175c
JS		 2035 printk("cyc:startup raising DTR\n");
2036 printk(" status: 0x%x, 0x%x\n",
2037 cy_readb(base_addr + (CyMSVR1 << index)),
2038 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4
LT		 2039#endif
2040
02f1175c
JS		 2041 cy_writeb(base_addr + (CySRER << index),
2042 cy_readb(base_addr + (CySRER << index)) | CyRxData);
2043 info->flags |= ASYNC_INITIALIZED;
1da177e4 2044
02f1175c
JS		 2045 if (info->tty) {
2046 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2047 }
2048 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2049 info->breakon = info->breakoff = 0;
2050 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2051 info->idle_stats.in_use =
2052 info->idle_stats.recv_idle =
2053 info->idle_stats.xmit_idle = jiffies;
1da177e4 2054
02f1175c 2055 CY_UNLOCK(info, flags);
1da177e4 2056
02f1175c
JS		 2057 } else {
2058 struct FIRM_ID __iomem *firm_id;
2059 struct ZFW_CTRL __iomem *zfw_ctrl;
2060 struct BOARD_CTRL __iomem *board_ctrl;
2061 struct CH_CTRL __iomem *ch_ctrl;
2062 int retval;
1da177e4 2063
02f1175c 2064 base_addr = cy_card[card].base_addr;
1da177e4 2065
02f1175c
JS		 2066 firm_id = base_addr + ID_ADDRESS;
2067 if (!ISZLOADED(cy_card[card])) {
2068 return -ENODEV;
2069 }
1da177e4 2070
02f1175c
JS		 2071 zfw_ctrl = cy_card[card].base_addr +
2072 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2073 board_ctrl = &zfw_ctrl->board_ctrl;
2074 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4
LT		 2075
2076#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2077 printk("cyc startup Z card %d, channel %d, base_addr %lx\n",
2078 card, channel, (long)base_addr);
2079 /**/
1da177e4 2080#endif
02f1175c 2081 CY_LOCK(info, flags);
1da177e4 2082
02f1175c 2083 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
1da177e4
LT		 2084#ifdef Z_WAKE
2085#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2086 cy_writel(&ch_ctrl[channel].intr_enable,
2087 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2088 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1da177e4 2089#else
02f1175c
JS		 2090 cy_writel(&ch_ctrl[channel].intr_enable,
2091 C_IN_IOCTLW | C_IN_MDCD);
2092#endif /* CONFIG_CYZ_INTR */
1da177e4
LT		 2093#else
2094#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 2095 cy_writel(&ch_ctrl[channel].intr_enable,
2096 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2097 C_IN_RXNNDT | C_IN_MDCD);
1da177e4 2098#else
02f1175c
JS		 2099 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2100#endif /* CONFIG_CYZ_INTR */
2101#endif /* Z_WAKE */
2102
2103 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
2104 if (retval != 0) {
2105 printk("cyc:startup(1) retval on ttyC%d was %x\n",
2106 info->line, retval);
2107 }
1da177e4 2108
02f1175c
JS		 2109 /* Flush RX buffers before raising DTR and RTS */
2110 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_RX,
2111 0L);
2112 if (retval != 0) {
2113 printk("cyc:startup(2) retval on ttyC%d was %x\n",
2114 info->line, retval);
2115 }
1da177e4 2116
02f1175c
JS		 2117 /* set timeout !!! */
2118 /* set RTS and DTR !!! */
2119 cy_writel(&ch_ctrl[channel].rs_control,
2120 cy_readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2121 C_RS_DTR);
2122 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2123 C_CM_IOCTLM, 0L);
2124 if (retval != 0) {
2125 printk("cyc:startup(3) retval on ttyC%d was %x\n",
2126 info->line, retval);
2127 }
1da177e4 2128#ifdef CY_DEBUG_DTR
02f1175c 2129 printk("cyc:startup raising Z DTR\n");
1da177e4
LT		 2130#endif
2131
02f1175c
JS		 2132 /* enable send, recv, modem !!! */
2133
2134 info->flags |= ASYNC_INITIALIZED;
2135 if (info->tty) {
2136 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2137 }
2138 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2139 info->breakon = info->breakoff = 0;
2140 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2141 info->idle_stats.in_use =
2142 info->idle_stats.recv_idle =
2143 info->idle_stats.xmit_idle = jiffies;
1da177e4 2144
02f1175c 2145 CY_UNLOCK(info, flags);
1da177e4 2146 }
1da177e4
LT		 2147
2148#ifdef CY_DEBUG_OPEN
2149 printk(" cyc startup done\n");
2150#endif
2151 return 0;
2152
2153errout:
2154 CY_UNLOCK(info, flags);
2155 return retval;
02f1175c 2156} /* startup */
1da177e4 2157
02f1175c 2158static void start_xmit(struct cyclades_port *info)
1da177e4 2159{
02f1175c
JS		 2160 unsigned long flags;
2161 void __iomem *base_addr;
2162 int card, chip, channel, index;
1da177e4 2163
02f1175c
JS		 2164 card = info->card;
2165 channel = (info->line) - (cy_card[card].first_line);
2166 if (!IS_CYC_Z(cy_card[card])) {
2167 chip = channel >> 2;
2168 channel &= 0x03;
2169 index = cy_card[card].bus_index;
2170 base_addr = cy_card[card].base_addr +
2171 (cy_chip_offset[chip] << index);
2172
2173 CY_LOCK(info, flags);
2174 cy_writeb(base_addr + (CyCAR << index), channel);
2175 cy_writeb(base_addr + (CySRER << index),
2176 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
2177 CY_UNLOCK(info, flags);
2178 } else {
1da177e4 2179#ifdef CONFIG_CYZ_INTR
02f1175c 2180 int retval;
1da177e4 2181
02f1175c
JS		 2182 CY_LOCK(info, flags);
2183 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_INTBACK,
2184 0L);
2185 if (retval != 0) {
2186 printk("cyc:start_xmit retval on ttyC%d was %x\n",
2187 info->line, retval);
2188 }
2189 CY_UNLOCK(info, flags);
2190#else /* CONFIG_CYZ_INTR */
2191 /* Don't have to do anything at this time */
2192#endif /* CONFIG_CYZ_INTR */
2193 }
2194} /* start_xmit */
1da177e4
LT		 2195
2196/*
2197 * This routine shuts down a serial port; interrupts are disabled,
2198 * and DTR is dropped if the hangup on close termio flag is on.
2199 */
02f1175c 2200static void shutdown(struct cyclades_port *info)
1da177e4 2201{
02f1175c
JS		 2202 unsigned long flags;
2203 void __iomem *base_addr;
2204 int card, chip, channel, index;
2205
2206 if (!(info->flags & ASYNC_INITIALIZED)) {
2207 return;
2208 }
2209
2210 card = info->card;
2211 channel = info->line - cy_card[card].first_line;
2212 if (!IS_CYC_Z(cy_card[card])) {
2213 chip = channel >> 2;
2214 channel &= 0x03;
2215 index = cy_card[card].bus_index;
2216 base_addr = cy_card[card].base_addr +
2217 (cy_chip_offset[chip] << index);
1da177e4
LT		 2218
2219#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2220 printk("cyc shutdown Y card %d, chip %d, channel %d, "
2221 "base_addr %lx\n",
2222 card, chip, channel, (long)base_addr);
1da177e4
LT		 2223#endif
2224
02f1175c
JS		 2225 CY_LOCK(info, flags);
2226
2227 /* Clear delta_msr_wait queue to avoid mem leaks. */
2228 wake_up_interruptible(&info->delta_msr_wait);
1da177e4 2229
02f1175c
JS		 2230 if (info->xmit_buf) {
2231 unsigned char *temp;
2232 temp = info->xmit_buf;
2233 info->xmit_buf = NULL;
2234 free_page((unsigned long)temp);
2235 }
2236 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2237 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2238 cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2239 cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
1da177e4 2240#ifdef CY_DEBUG_DTR
02f1175c
JS		 2241 printk("cyc shutdown dropping DTR\n");
2242 printk(" status: 0x%x, 0x%x\n",
2243 cy_readb(base_addr + (CyMSVR1 << index)),
2244 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 2245#endif
02f1175c
JS		 2246 }
2247 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2248 /* it may be appropriate to clear _XMIT at
2249 some later date (after testing)!!! */
2250
2251 if (info->tty) {
2252 set_bit(TTY_IO_ERROR, &info->tty->flags);
2253 }
2254 info->flags &= ~ASYNC_INITIALIZED;
2255 CY_UNLOCK(info, flags);
2256 } else {
2257 struct FIRM_ID __iomem *firm_id;
2258 struct ZFW_CTRL __iomem *zfw_ctrl;
2259 struct BOARD_CTRL __iomem *board_ctrl;
2260 struct CH_CTRL __iomem *ch_ctrl;
2261 int retval;
2262
2263 base_addr = cy_card[card].base_addr;
1da177e4 2264#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2265 printk("cyc shutdown Z card %d, channel %d, base_addr %lx\n",
2266 card, channel, (long)base_addr);
1da177e4
LT		 2267#endif
2268
02f1175c
JS		 2269 firm_id = base_addr + ID_ADDRESS;
2270 if (!ISZLOADED(cy_card[card])) {
2271 return;
2272 }
1da177e4 2273
02f1175c
JS		 2274 zfw_ctrl = cy_card[card].base_addr +
2275 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2276 board_ctrl = &zfw_ctrl->board_ctrl;
2277 ch_ctrl = zfw_ctrl->ch_ctrl;
1da177e4 2278
02f1175c 2279 CY_LOCK(info, flags);
1da177e4 2280
02f1175c
JS		 2281 if (info->xmit_buf) {
2282 unsigned char *temp;
2283 temp = info->xmit_buf;
2284 info->xmit_buf = NULL;
2285 free_page((unsigned long)temp);
1da177e4 2286 }
02f1175c
JS		 2287
2288 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2289 cy_writel(&ch_ctrl[channel].rs_control,
2290 (uclong)(cy_readl(&ch_ctrl[channel].rs_control)&
2291 ~(C_RS_RTS | C_RS_DTR)));
2292 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2293 C_CM_IOCTLM, 0L);
2294 if (retval != 0) {
2295 printk("cyc:shutdown retval on ttyC%d was %x\n",
2296 info->line, retval);
2297 }
1da177e4 2298#ifdef CY_DEBUG_DTR
02f1175c 2299 printk("cyc:shutdown dropping Z DTR\n");
1da177e4 2300#endif
02f1175c 2301 }
1da177e4 2302
02f1175c
JS		 2303 if (info->tty) {
2304 set_bit(TTY_IO_ERROR, &info->tty->flags);
2305 }
2306 info->flags &= ~ASYNC_INITIALIZED;
2307
2308 CY_UNLOCK(info, flags);
2309 }
1da177e4
LT		 2310
2311#ifdef CY_DEBUG_OPEN
02f1175c 2312 printk(" cyc shutdown done\n");
1da177e4 2313#endif
02f1175c 2314} /* shutdown */
1da177e4
LT		 2315
2316/*
2317 * ------------------------------------------------------------
2318 * cy_open() and friends
2319 * ------------------------------------------------------------
2320 */
2321
2322static int
02f1175c
JS		 2323block_til_ready(struct tty_struct *tty, struct file *filp,
2324 struct cyclades_port *info)
1da177e4 2325{
02f1175c
JS		 2326 DECLARE_WAITQUEUE(wait, current);
2327 struct cyclades_card *cinfo;
2328 unsigned long flags;
2329 int chip, channel, index;
2330 int retval;
2331 void __iomem *base_addr;
2332
2333 cinfo = &cy_card[info->card];
2334 channel = info->line - cinfo->first_line;
2335
2336 /*
2337 * If the device is in the middle of being closed, then block
2338 * until it's done, and then try again.
2339 */
2340 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2341 if (info->flags & ASYNC_CLOSING) {
2342 interruptible_sleep_on(&info->close_wait);
2343 }
096dcfce 2344 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1da177e4 2345 }
02f1175c
JS		 2346
2347 /*
2348 * If non-blocking mode is set, then make the check up front
2349 * and then exit.
2350 */
2351 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2352 info->flags |= ASYNC_NORMAL_ACTIVE;
2353 return 0;
2354 }
2355
2356 /*
2357 * Block waiting for the carrier detect and the line to become
2358 * free (i.e., not in use by the callout). While we are in
2359 * this loop, info->count is dropped by one, so that
2360 * cy_close() knows when to free things. We restore it upon
2361 * exit, either normal or abnormal.
2362 */
2363 retval = 0;
2364 add_wait_queue(&info->open_wait, &wait);
1da177e4 2365#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2366 printk("cyc block_til_ready before block: ttyC%d, count = %d\n",
2367 info->line, info->count);
2368 /**/
1da177e4 2369#endif
02f1175c
JS		 2370 CY_LOCK(info, flags);
2371 if (!tty_hung_up_p(filp))
2372 info->count--;
2373 CY_UNLOCK(info, flags);
1da177e4 2374#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2375 printk("cyc block_til_ready: (%d): decrementing count to %d\n",
2376 current->pid, info->count);
1da177e4 2377#endif
02f1175c
JS		 2378 info->blocked_open++;
2379
2380 if (!IS_CYC_Z(*cinfo)) {
2381 chip = channel >> 2;
2382 channel &= 0x03;
2383 index = cinfo->bus_index;
2384 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2385
2386 while (1) {
2387 CY_LOCK(info, flags);
2388 if ((tty->termios->c_cflag & CBAUD)) {
2389 cy_writeb(base_addr + (CyCAR << index),
2390 (u_char) channel);
2391 cy_writeb(base_addr + (CyMSVR1 << index),
2392 CyRTS);
2393 cy_writeb(base_addr + (CyMSVR2 << index),
2394 CyDTR);
1da177e4 2395#ifdef CY_DEBUG_DTR
02f1175c
JS		 2396 printk("cyc:block_til_ready raising DTR\n");
2397 printk(" status: 0x%x, 0x%x\n",
2398 cy_readb(base_addr +
2399 (CyMSVR1 << index)),
2400 cy_readb(base_addr +
2401 (CyMSVR2 << index)));
1da177e4 2402#endif
02f1175c
JS		 2403 }
2404 CY_UNLOCK(info, flags);
1da177e4 2405
02f1175c
JS		 2406 set_current_state(TASK_INTERRUPTIBLE);
2407 if (tty_hung_up_p(filp) ||
2408 !(info->flags & ASYNC_INITIALIZED)) {
2409 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2410 -EAGAIN : -ERESTARTSYS);
2411 break;
2412 }
1da177e4 2413
02f1175c
JS		 2414 CY_LOCK(info, flags);
2415 cy_writeb(base_addr + (CyCAR << index),
2416 (u_char) channel);
2417 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2418 (cy_readb(base_addr +
2419 (CyMSVR1 << index)) & CyDCD))) {
2420 CY_UNLOCK(info, flags);
2421 break;
2422 }
1da177e4 2423 CY_UNLOCK(info, flags);
1da177e4 2424
02f1175c
JS		 2425 if (signal_pending(current)) {
2426 retval = -ERESTARTSYS;
2427 break;
2428 }
1da177e4 2429#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2430 printk("cyc block_til_ready blocking: ttyC%d, "
2431 "count = %d\n",
2432 info->line, info->count);
2433 /**/
1da177e4 2434#endif
02f1175c 2435 schedule();
1da177e4 2436 }
02f1175c
JS		 2437 } else {
2438 struct FIRM_ID __iomem *firm_id;
2439 struct ZFW_CTRL __iomem *zfw_ctrl;
2440 struct BOARD_CTRL __iomem *board_ctrl;
2441 struct CH_CTRL __iomem *ch_ctrl;
2442 int retval;
2443
2444 base_addr = cinfo->base_addr;
2445 firm_id = base_addr + ID_ADDRESS;
2446 if (!ISZLOADED(*cinfo)) {
2447 current->state = TASK_RUNNING;
2448 remove_wait_queue(&info->open_wait, &wait);
2449 return -EINVAL;
2450 }
2451
2452 zfw_ctrl = base_addr + (cy_readl(&firm_id->zfwctrl_addr) &
2453 0xfffff);
2454 board_ctrl = &zfw_ctrl->board_ctrl;
2455 ch_ctrl = zfw_ctrl->ch_ctrl;
2456
2457 while (1) {
2458 if ((tty->termios->c_cflag & CBAUD)) {
2459 cy_writel(&ch_ctrl[channel].rs_control,
2460 cy_readl(&ch_ctrl[channel].
2461 rs_control) | (C_RS_RTS |
2462 C_RS_DTR));
2463 retval = cyz_issue_cmd(&cy_card[info->card],
2464 channel, C_CM_IOCTLM, 0L);
2465 if (retval != 0) {
2466 printk("cyc:block_til_ready retval on "
2467 "ttyC%d was %x\n",
2468 info->line, retval);
2469 }
1da177e4 2470#ifdef CY_DEBUG_DTR
02f1175c 2471 printk("cyc:block_til_ready raising Z DTR\n");
1da177e4 2472#endif
02f1175c 2473 }
1da177e4 2474
02f1175c
JS		 2475 set_current_state(TASK_INTERRUPTIBLE);
2476 if (tty_hung_up_p(filp) ||
2477 !(info->flags & ASYNC_INITIALIZED)) {
2478 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2479 -EAGAIN : -ERESTARTSYS);
2480 break;
2481 }
2482 if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2483 (cy_readl(&ch_ctrl[channel].rs_status) &
2484 C_RS_DCD))) {
2485 break;
2486 }
2487 if (signal_pending(current)) {
2488 retval = -ERESTARTSYS;
2489 break;
2490 }
1da177e4 2491#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2492 printk("cyc block_til_ready blocking: ttyC%d, "
2493 "count = %d\n",
2494 info->line, info->count);
2495 /**/
1da177e4 2496#endif
02f1175c
JS		 2497 schedule();
2498 }
1da177e4 2499 }
02f1175c
JS		 2500 current->state = TASK_RUNNING;
2501 remove_wait_queue(&info->open_wait, &wait);
2502 if (!tty_hung_up_p(filp)) {
2503 info->count++;
1da177e4 2504#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2505 printk("cyc:block_til_ready (%d): incrementing count to %d\n",
2506 current->pid, info->count);
1da177e4 2507#endif
02f1175c
JS		 2508 }
2509 info->blocked_open--;
1da177e4 2510#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2511 printk("cyc:block_til_ready after blocking: ttyC%d, count = %d\n",
2512 info->line, info->count);
2513 /**/
1da177e4 2514#endif
02f1175c
JS		 2515 if (retval)
2516 return retval;
2517 info->flags |= ASYNC_NORMAL_ACTIVE;
2518 return 0;
2519} /* block_til_ready */
1da177e4
LT		 2520
2521/*
2522 * This routine is called whenever a serial port is opened. It
2523 * performs the serial-specific initialization for the tty structure.
2524 */
02f1175c 2525static int cy_open(struct tty_struct *tty, struct file *filp)
1da177e4 2526{
02f1175c
JS		 2527 struct cyclades_port *info;
2528 int retval, line;
1da177e4 2529
02f1175c
JS		 2530 line = tty->index;
2531 if ((line < 0) || (NR_PORTS <= line)) {
2532 return -ENODEV;
2533 }
2534 info = &cy_port[line];
2535 if (info->line < 0) {
2536 return -ENODEV;
2537 }
1da177e4 2538
02f1175c
JS		 2539 /* If the card's firmware hasn't been loaded,
2540 treat it as absent from the system. This
2541 will make the user pay attention.
2542 */
2543 if (IS_CYC_Z(cy_card[info->card])) {
2544 struct cyclades_card *cinfo = &cy_card[info->card];
2545 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2546
2547 if (!ISZLOADED(*cinfo)) {
2548 if (((ZE_V1 == cy_readl(
2549 &((struct RUNTIME_9060 __iomem *)
2550 (cinfo->ctl_addr))->mail_box_0)) &&
2551 Z_FPGA_CHECK(*cinfo)) &&
2552 (ZFIRM_HLT == cy_readl(
2553 &firm_id->signature))) {
2554 printk("cyc:Cyclades-Z Error: you need an "
2555 "external power supply for this number "
2556 "of ports.\n\rFirmware halted.\r\n");
2557 } else {
2558 printk("cyc:Cyclades-Z firmware not yet "
2559 "loaded\n");
2560 }
2561 return -ENODEV;
2562 }
2563#ifdef CONFIG_CYZ_INTR
2564 else {
2565 /* In case this Z board is operating in interrupt mode, its
2566 interrupts should be enabled as soon as the first open
2567 happens to one of its ports. */
2568 if (!cinfo->intr_enabled) {
2569 struct ZFW_CTRL __iomem *zfw_ctrl;
2570 struct BOARD_CTRL __iomem *board_ctrl;
2571
2572 zfw_ctrl = cinfo->base_addr +
2573 (cy_readl(&firm_id->zfwctrl_addr) &
2574 0xfffff);
2575
2576 board_ctrl = &zfw_ctrl->board_ctrl;
2577
2578 /* Enable interrupts on the PLX chip */
2579 cy_writew(cinfo->ctl_addr + 0x68,
2580 cy_readw(cinfo->ctl_addr +
2581 0x68) | 0x0900);
2582 /* Enable interrupts on the FW */
2583 retval = cyz_issue_cmd(cinfo, 0,
2584 C_CM_IRQ_ENBL, 0L);
2585 if (retval != 0) {
2586 printk("cyc:IRQ enable retval was %x\n",
2587 retval);
2588 }
2589 cinfo->nports =
2590 (int)cy_readl(&board_ctrl->n_channel);
2591 cinfo->intr_enabled = 1;
2592 }
1da177e4 2593 }
02f1175c
JS		 2594#endif /* CONFIG_CYZ_INTR */
2595 /* Make sure this Z port really exists in hardware */
2596 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2597 return -ENODEV;
1da177e4 2598 }
1da177e4 2599#ifdef CY_DEBUG_OTHER
02f1175c 2600 printk("cyc:cy_open ttyC%d\n", info->line); /* */
1da177e4 2601#endif
02f1175c
JS		 2602 tty->driver_data = info;
2603 info->tty = tty;
2604 if (serial_paranoia_check(info, tty->name, "cy_open")) {
2605 return -ENODEV;
2606 }
1da177e4 2607#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2608 printk("cyc:cy_open ttyC%d, count = %d\n", info->line, info->count);
2609 /**/
1da177e4 2610#endif
02f1175c 2611 info->count++;
1da177e4 2612#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2613 printk("cyc:cy_open (%d): incrementing count to %d\n",
2614 current->pid, info->count);
1da177e4 2615#endif
1da177e4 2616
02f1175c
JS		 2617 /*
2618 * If the port is the middle of closing, bail out now
2619 */
2620 if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2621 if (info->flags & ASYNC_CLOSING)
2622 interruptible_sleep_on(&info->close_wait);
096dcfce 2623 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
02f1175c 2624 }
1da177e4 2625
02f1175c
JS		 2626 /*
2627 * Start up serial port
2628 */
2629 retval = startup(info);
2630 if (retval) {
2631 return retval;
2632 }
1da177e4 2633
02f1175c
JS		 2634 retval = block_til_ready(tty, filp, info);
2635 if (retval) {
1da177e4 2636#ifdef CY_DEBUG_OPEN
02f1175c
JS		 2637 printk("cyc:cy_open returning after block_til_ready with %d\n",
2638 retval);
1da177e4 2639#endif
02f1175c
JS		 2640 return retval;
2641 }
1da177e4 2642
02f1175c 2643 info->throttle = 0;
1da177e4 2644
02f1175c
JS		 2645#ifdef CY_DEBUG_OPEN
2646 printk(" cyc:cy_open done\n");
2647 /**/
2648#endif
2649 return 0;
2650} /* cy_open */
1da177e4
LT		 2651
2652/*
2653 * cy_wait_until_sent() --- wait until the transmitter is empty
2654 */
02f1175c 2655static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1da177e4 2656{
02f1175c
JS		 2657 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2658 void __iomem *base_addr;
2659 int card, chip, channel, index;
2660 unsigned long orig_jiffies;
2661 int char_time;
2662
2663 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2664 return;
2665
2666 if (info->xmit_fifo_size == 0)
2667 return; /* Just in case.... */
1da177e4 2668
02f1175c
JS		 2669 orig_jiffies = jiffies;
2670 /*
2671 * Set the check interval to be 1/5 of the estimated time to
2672 * send a single character, and make it at least 1. The check
2673 * interval should also be less than the timeout.
2674 *
2675 * Note: we have to use pretty tight timings here to satisfy
2676 * the NIST-PCTS.
2677 */
2678 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2679 char_time = char_time / 5;
2680 if (char_time <= 0)
2681 char_time = 1;
2682 if (timeout < 0)
2683 timeout = 0;
2684 if (timeout)
2685 char_time = min(char_time, timeout);
2686 /*
2687 * If the transmitter hasn't cleared in twice the approximate
2688 * amount of time to send the entire FIFO, it probably won't
2689 * ever clear. This assumes the UART isn't doing flow
2690 * control, which is currently the case. Hence, if it ever
2691 * takes longer than info->timeout, this is probably due to a
2692 * UART bug of some kind. So, we clamp the timeout parameter at
2693 * 2*info->timeout.
2694 */
2695 if (!timeout || timeout > 2 * info->timeout)
2696 timeout = 2 * info->timeout;
1da177e4 2697#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c
JS		 2698 printk("In cy_wait_until_sent(%d) check=%lu...", timeout, char_time);
2699 printk("jiff=%lu...", jiffies);
1da177e4 2700#endif
02f1175c
JS		 2701 card = info->card;
2702 channel = (info->line) - (cy_card[card].first_line);
2703 if (!IS_CYC_Z(cy_card[card])) {
2704 chip = channel >> 2;
2705 channel &= 0x03;
2706 index = cy_card[card].bus_index;
2707 base_addr =
2708 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
2709 while (cy_readb(base_addr + (CySRER << index)) & CyTxRdy) {
1da177e4 2710#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2711 printk("Not clean (jiff=%lu)...", jiffies);
1da177e4 2712#endif
02f1175c
JS		 2713 if (msleep_interruptible(jiffies_to_msecs(char_time)))
2714 break;
2715 if (timeout && time_after(jiffies, orig_jiffies +
2716 timeout))
2717 break;
2718 }
2719 } else {
096dcfce 2720 /* Nothing to do! */
1da177e4 2721 }
02f1175c
JS		 2722 /* Run one more char cycle */
2723 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1da177e4 2724#ifdef CY_DEBUG_WAIT_UNTIL_SENT
02f1175c 2725 printk("Clean (jiff=%lu)...done\n", jiffies);
1da177e4
LT		 2726#endif
2727}
2728
2729/*
2730 * This routine is called when a particular tty device is closed.
2731 */
02f1175c 2732static void cy_close(struct tty_struct *tty, struct file *filp)
1da177e4 2733{
02f1175c
JS		 2734 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2735 unsigned long flags;
1da177e4
LT		 2736
2737#ifdef CY_DEBUG_OTHER
02f1175c 2738 printk("cyc:cy_close ttyC%d\n", info->line);
1da177e4
LT		 2739#endif
2740
02f1175c
JS		 2741 if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2742 return;
2743 }
1da177e4 2744
02f1175c
JS		 2745 CY_LOCK(info, flags);
2746 /* If the TTY is being hung up, nothing to do */
2747 if (tty_hung_up_p(filp)) {
2748 CY_UNLOCK(info, flags);
2749 return;
2750 }
1da177e4 2751#ifdef CY_DEBUG_OPEN
02f1175c 2752 printk("cyc:cy_close ttyC%d, count = %d\n", info->line, info->count);
1da177e4 2753#endif
02f1175c
JS		 2754 if ((tty->count == 1) && (info->count != 1)) {
2755 /*
2756 * Uh, oh. tty->count is 1, which means that the tty
2757 * structure will be freed. Info->count should always
2758 * be one in these conditions. If it's greater than
2759 * one, we've got real problems, since it means the
2760 * serial port won't be shutdown.
2761 */
2762 printk("cyc:cy_close: bad serial port count; tty->count is 1, "
2763 "info->count is %d\n", info->count);
2764 info->count = 1;
2765 }
1da177e4 2766#ifdef CY_DEBUG_COUNT
02f1175c
JS		 2767 printk("cyc:cy_close at (%d): decrementing count to %d\n",
2768 current->pid, info->count - 1);
1da177e4 2769#endif
02f1175c 2770 if (--info->count < 0) {
1da177e4 2771#ifdef CY_DEBUG_COUNT
02f1175c 2772 printk("cyc:cyc_close setting count to 0\n");
1da177e4 2773#endif
02f1175c 2774 info->count = 0;
1da177e4 2775 }
02f1175c
JS		 2776 if (info->count) {
2777 CY_UNLOCK(info, flags);
2778 return;
2779 }
2780 info->flags |= ASYNC_CLOSING;
1da177e4 2781
02f1175c
JS		 2782 /*
2783 * Now we wait for the transmit buffer to clear; and we notify
2784 * the line discipline to only process XON/XOFF characters.
2785 */
2786 tty->closing = 1;
2787 CY_UNLOCK(info, flags);
2788 if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2789 tty_wait_until_sent(tty, info->closing_wait);
1da177e4 2790 }
02f1175c
JS		 2791 CY_LOCK(info, flags);
2792
2793 if (!IS_CYC_Z(cy_card[info->card])) {
2794 int channel = info->line - cy_card[info->card].first_line;
2795 int index = cy_card[info->card].bus_index;
2796 void __iomem *base_addr = cy_card[info->card].base_addr +
2797 (cy_chip_offset[channel >> 2] << index);
2798 /* Stop accepting input */
2799 channel &= 0x03;
2800 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2801 cy_writeb(base_addr + (CySRER << index),
2802 cy_readb(base_addr + (CySRER << index)) & ~CyRxData);
2803 if (info->flags & ASYNC_INITIALIZED) {
2804 /* Waiting for on-board buffers to be empty before closing
2805 the port */
2806 CY_UNLOCK(info, flags);
2807 cy_wait_until_sent(tty, info->timeout);
2808 CY_LOCK(info, flags);
2809 }
2810 } else {
2811#ifdef Z_WAKE
2812 /* Waiting for on-board buffers to be empty before closing the port */
2813 void __iomem *base_addr = cy_card[info->card].base_addr;
2814 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2815 struct ZFW_CTRL __iomem *zfw_ctrl =
2816 base_addr + (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
2817 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2818 int channel = info->line - cy_card[info->card].first_line;
2819 int retval;
2820
2821 if (cy_readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2822 retval = cyz_issue_cmd(&cy_card[info->card], channel,
2823 C_CM_IOCTLW, 0L);
2824 if (retval != 0) {
2825 printk("cyc:cy_close retval on ttyC%d was %x\n",
2826 info->line, retval);
2827 }
2828 CY_UNLOCK(info, flags);
2829 interruptible_sleep_on(&info->shutdown_wait);
2830 CY_LOCK(info, flags);
2831 }
1da177e4 2832#endif
02f1175c
JS		 2833 }
2834
1da177e4 2835 CY_UNLOCK(info, flags);
02f1175c
JS		 2836 shutdown(info);
2837 if (tty->driver->flush_buffer)
2838 tty->driver->flush_buffer(tty);
2839 tty_ldisc_flush(tty);
1da177e4 2840 CY_LOCK(info, flags);
02f1175c
JS		 2841
2842 tty->closing = 0;
2843 info->event = 0;
2844 info->tty = NULL;
2845 if (info->blocked_open) {
2846 CY_UNLOCK(info, flags);
2847 if (info->close_delay) {
2848 msleep_interruptible(jiffies_to_msecs
2849 (info->close_delay));
2850 }
2851 wake_up_interruptible(&info->open_wait);
2852 CY_LOCK(info, flags);
2853 }
2854 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2855 wake_up_interruptible(&info->close_wait);
1da177e4
LT		 2856
2857#ifdef CY_DEBUG_OTHER
02f1175c 2858 printk(" cyc:cy_close done\n");
1da177e4
LT		 2859#endif
2860
02f1175c 2861 CY_UNLOCK(info, flags);
02f1175c 2862} /* cy_close */
1da177e4
LT		 2863
2864/* This routine gets called when tty_write has put something into
2865 * the write_queue. The characters may come from user space or
2866 * kernel space.
2867 *
2868 * This routine will return the number of characters actually
2869 * accepted for writing.
2870 *
2871 * If the port is not already transmitting stuff, start it off by
2872 * enabling interrupts. The interrupt service routine will then
2873 * ensure that the characters are sent.
2874 * If the port is already active, there is no need to kick it.
2875 *
2876 */
02f1175c 2877static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1da177e4 2878{
02f1175c
JS		 2879 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2880 unsigned long flags;
2881 int c, ret = 0;
1da177e4
LT		 2882
2883#ifdef CY_DEBUG_IO
02f1175c 2884 printk("cyc:cy_write ttyC%d\n", info->line); /* */
1da177e4
LT		 2885#endif
2886
02f1175c
JS		 2887 if (serial_paranoia_check(info, tty->name, "cy_write")) {
2888 return 0;
2889 }
1da177e4 2890
02f1175c
JS		 2891 if (!info->xmit_buf)
2892 return 0;
1da177e4 2893
02f1175c
JS		 2894 CY_LOCK(info, flags);
2895 while (1) {
2896 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2897 (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2898
2899 if (c <= 0)
2900 break;
2901
2902 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2903 info->xmit_head = (info->xmit_head + c) &
2904 (SERIAL_XMIT_SIZE - 1);
2905 info->xmit_cnt += c;
2906 buf += c;
2907 count -= c;
2908 ret += c;
2909 }
2910 CY_UNLOCK(info, flags);
2911
2912 info->idle_stats.xmit_bytes += ret;
2913 info->idle_stats.xmit_idle = jiffies;
2914
2915 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2916 start_xmit(info);
2917 }
2918 return ret;
2919} /* cy_write */
1da177e4
LT		 2920
2921/*
2922 * This routine is called by the kernel to write a single
2923 * character to the tty device. If the kernel uses this routine,
2924 * it must call the flush_chars() routine (if defined) when it is
2925 * done stuffing characters into the driver. If there is no room
2926 * in the queue, the character is ignored.
2927 */
02f1175c 2928static void cy_put_char(struct tty_struct *tty, unsigned char ch)
1da177e4 2929{
02f1175c
JS		 2930 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2931 unsigned long flags;
1da177e4
LT		 2932
2933#ifdef CY_DEBUG_IO
02f1175c 2934 printk("cyc:cy_put_char ttyC%d\n", info->line);
1da177e4
LT		 2935#endif
2936
02f1175c
JS		 2937 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2938 return;
1da177e4 2939
02f1175c
JS		 2940 if (!info->xmit_buf)
2941 return;
1da177e4 2942
02f1175c
JS		 2943 CY_LOCK(info, flags);
2944 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1) {
2945 CY_UNLOCK(info, flags);
2946 return;
2947 }
1da177e4 2948
02f1175c
JS		 2949 info->xmit_buf[info->xmit_head++] = ch;
2950 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2951 info->xmit_cnt++;
1da177e4
LT		 2952 info->idle_stats.xmit_bytes++;
2953 info->idle_stats.xmit_idle = jiffies;
02f1175c
JS		 2954 CY_UNLOCK(info, flags);
2955} /* cy_put_char */
1da177e4
LT		 2956
2957/*
2958 * This routine is called by the kernel after it has written a
2959 * series of characters to the tty device using put_char().
2960 */
02f1175c 2961static void cy_flush_chars(struct tty_struct *tty)
1da177e4 2962{
02f1175c
JS		 2963 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2964
1da177e4 2965#ifdef CY_DEBUG_IO
02f1175c 2966 printk("cyc:cy_flush_chars ttyC%d\n", info->line); /* */
1da177e4
LT		 2967#endif
2968
02f1175c
JS		 2969 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2970 return;
1da177e4 2971
02f1175c
JS		 2972 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2973 !info->xmit_buf)
2974 return;
1da177e4 2975
02f1175c
JS		 2976 start_xmit(info);
2977} /* cy_flush_chars */
1da177e4
LT		 2978
2979/*
2980 * This routine returns the numbers of characters the tty driver
2981 * will accept for queuing to be written. This number is subject
2982 * to change as output buffers get emptied, or if the output flow
2983 * control is activated.
2984 */
02f1175c 2985static int cy_write_room(struct tty_struct *tty)
1da177e4 2986{
02f1175c
JS		 2987 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
2988 int ret;
2989
1da177e4 2990#ifdef CY_DEBUG_IO
02f1175c 2991 printk("cyc:cy_write_room ttyC%d\n", info->line); /* */
1da177e4
LT		 2992#endif
2993
02f1175c
JS		 2994 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2995 return 0;
2996 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2997 if (ret < 0)
2998 ret = 0;
2999 return ret;
3000} /* cy_write_room */
1da177e4 3001
02f1175c 3002static int cy_chars_in_buffer(struct tty_struct *tty)
1da177e4 3003{
02f1175c
JS		 3004 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3005 int card, channel;
1da177e4 3006
02f1175c
JS		 3007 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
3008 return 0;
3009
3010 card = info->card;
3011 channel = (info->line) - (cy_card[card].first_line);
1da177e4
LT		 3012
3013#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 3014 if (!IS_CYC_Z(cy_card[card])) {
3015#endif /* Z_EXT_CHARS_IN_BUFFER */
1da177e4 3016#ifdef CY_DEBUG_IO
02f1175c 3017 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt); /* */
1da177e4 3018#endif
02f1175c 3019 return info->xmit_cnt;
1da177e4 3020#ifdef Z_EXT_CHARS_IN_BUFFER
02f1175c
JS		 3021 } else {
3022 static volatile struct FIRM_ID *firm_id;
3023 static volatile struct ZFW_CTRL *zfw_ctrl;
3024 static volatile struct CH_CTRL *ch_ctrl;
3025 static volatile struct BUF_CTRL *buf_ctrl;
3026 int char_count;
3027 volatile uclong tx_put, tx_get, tx_bufsize;
3028
3029 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3030 zfw_ctrl = cy_card[card].base_addr +
3031 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3032 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3033 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3034
3035 tx_get = cy_readl(&buf_ctrl->tx_get);
3036 tx_put = cy_readl(&buf_ctrl->tx_put);
3037 tx_bufsize = cy_readl(&buf_ctrl->tx_bufsize);
3038 if (tx_put >= tx_get)
3039 char_count = tx_put - tx_get;
3040 else
3041 char_count = tx_put - tx_get + tx_bufsize;
1da177e4 3042#ifdef CY_DEBUG_IO
02f1175c 3043 printk("cyc:cy_chars_in_buffer ttyC%d %d\n", info->line, info->xmit_cnt + char_count); /* */
1da177e4 3044#endif
096dcfce 3045 return info->xmit_cnt + char_count;
02f1175c
JS		 3046 }
3047#endif /* Z_EXT_CHARS_IN_BUFFER */
3048} /* cy_chars_in_buffer */
1da177e4
LT		 3049
3050/*
3051 * ------------------------------------------------------------
3052 * cy_ioctl() and friends
3053 * ------------------------------------------------------------
3054 */
3055
02f1175c 3056static void cyy_baud_calc(struct cyclades_port *info, uclong baud)
1da177e4 3057{
02f1175c
JS		 3058 int co, co_val, bpr;
3059 uclong cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3060 25000000);
1da177e4 3061
02f1175c
JS		 3062 if (baud == 0) {
3063 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3064 return;
3065 }
1da177e4 3066
02f1175c
JS		 3067 /* determine which prescaler to use */
3068 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3069 if (cy_clock / co_val / baud > 63)
3070 break;
3071 }
1da177e4 3072
02f1175c
JS		 3073 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3074 if (bpr > 255)
3075 bpr = 255;
1da177e4 3076
02f1175c
JS		 3077 info->tbpr = info->rbpr = bpr;
3078 info->tco = info->rco = co;
1da177e4
LT		 3079}
3080
3081/*
3082 * This routine finds or computes the various line characteristics.
3083 * It used to be called config_setup
3084 */
02f1175c 3085static void set_line_char(struct cyclades_port *info)
1da177e4 3086{
02f1175c
JS		 3087 unsigned long flags;
3088 void __iomem *base_addr;
3089 int card, chip, channel, index;
3090 unsigned cflag, iflag;
3091 unsigned short chip_number;
3092 int baud, baud_rate = 0;
3093 int i;
3094
3095 if (!info->tty || !info->tty->termios) {
3096 return;
1da177e4 3097 }
02f1175c
JS		 3098 if (info->line == -1) {
3099 return;
1da177e4 3100 }
02f1175c
JS		 3101 cflag = info->tty->termios->c_cflag;
3102 iflag = info->tty->termios->c_iflag;
1da177e4 3103
02f1175c
JS		 3104 /*
3105 * Set up the tty->alt_speed kludge
3106 */
3107 if (info->tty) {
3108 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3109 info->tty->alt_speed = 57600;
3110 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3111 info->tty->alt_speed = 115200;
3112 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3113 info->tty->alt_speed = 230400;
3114 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3115 info->tty->alt_speed = 460800;
1da177e4 3116 }
02f1175c
JS		 3117
3118 card = info->card;
3119 channel = (info->line) - (cy_card[card].first_line);
3120 chip_number = channel / 4;
3121
3122 if (!IS_CYC_Z(cy_card[card])) {
3123
3124 index = cy_card[card].bus_index;
3125
3126 /* baud rate */
3127 baud = tty_get_baud_rate(info->tty);
3128 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3129 ASYNC_SPD_CUST) {
3130 if (info->custom_divisor)
3131 baud_rate = info->baud / info->custom_divisor;
3132 else
3133 baud_rate = info->baud;
3134 } else if (baud > CD1400_MAX_SPEED) {
3135 baud = CD1400_MAX_SPEED;
3136 }
3137 /* find the baud index */
3138 for (i = 0; i < 20; i++) {
3139 if (baud == baud_table[i]) {
3140 break;
3141 }
3142 }
3143 if (i == 20) {
3144 i = 19; /* CD1400_MAX_SPEED */
3145 }
3146
3147 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3148 ASYNC_SPD_CUST) {
3149 cyy_baud_calc(info, baud_rate);
3150 } else {
3151 if (info->chip_rev >= CD1400_REV_J) {
3152 /* It is a CD1400 rev. J or later */
3153 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
3154 info->tco = baud_co_60[i]; /* Tx CO */
3155 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
3156 info->rco = baud_co_60[i]; /* Rx CO */
3157 } else {
3158 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
3159 info->tco = baud_co_25[i]; /* Tx CO */
3160 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
3161 info->rco = baud_co_25[i]; /* Rx CO */
3162 }
3163 }
3164 if (baud_table[i] == 134) {
3165 /* get it right for 134.5 baud */
3166 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3167 2;
3168 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3169 ASYNC_SPD_CUST) {
3170 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3171 baud_rate) + 2;
3172 } else if (baud_table[i]) {
3173 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3174 baud_table[i]) + 2;
3175 /* this needs to be propagated into the card info */
3176 } else {
3177 info->timeout = 0;
3178 }
3179 /* By tradition (is it a standard?) a baud rate of zero
3180 implies the line should be/has been closed. A bit
3181 later in this routine such a test is performed. */
3182
3183 /* byte size and parity */
3184 info->cor5 = 0;
3185 info->cor4 = 0;
3186 /* receive threshold */
3187 info->cor3 = (info->default_threshold ?
3188 info->default_threshold : baud_cor3[i]);
3189 info->cor2 = CyETC;
3190 switch (cflag & CSIZE) {
3191 case CS5:
3192 info->cor1 = Cy_5_BITS;
3193 break;
3194 case CS6:
3195 info->cor1 = Cy_6_BITS;
3196 break;
3197 case CS7:
3198 info->cor1 = Cy_7_BITS;
3199 break;
3200 case CS8:
3201 info->cor1 = Cy_8_BITS;
3202 break;
3203 }
3204 if (cflag & CSTOPB) {
3205 info->cor1 |= Cy_2_STOP;
3206 }
3207 if (cflag & PARENB) {
3208 if (cflag & PARODD) {
3209 info->cor1 |= CyPARITY_O;
3210 } else {
3211 info->cor1 |= CyPARITY_E;
3212 }
3213 } else {
3214 info->cor1 |= CyPARITY_NONE;
3215 }
3216
3217 /* CTS flow control flag */
3218 if (cflag & CRTSCTS) {
3219 info->flags |= ASYNC_CTS_FLOW;
3220 info->cor2 |= CyCtsAE;
3221 } else {
3222 info->flags &= ~ASYNC_CTS_FLOW;
3223 info->cor2 &= ~CyCtsAE;
3224 }
3225 if (cflag & CLOCAL)
3226 info->flags &= ~ASYNC_CHECK_CD;
3227 else
3228 info->flags |= ASYNC_CHECK_CD;
1da177e4
LT		 3229
3230 /***********************************************
3231 The hardware option, CyRtsAO, presents RTS when
3232 the chip has characters to send. Since most modems
3233 use RTS as reverse (inbound) flow control, this
3234 option is not used. If inbound flow control is
3235 necessary, DTR can be programmed to provide the
3236 appropriate signals for use with a non-standard
3237 cable. Contact Marcio Saito for details.
3238 ***********************************************/
3239
02f1175c
JS		 3240 chip = channel >> 2;
3241 channel &= 0x03;
3242 base_addr = cy_card[card].base_addr +
3243 (cy_chip_offset[chip] << index);
1da177e4 3244
02f1175c
JS		 3245 CY_LOCK(info, flags);
3246 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3247
3248 /* tx and rx baud rate */
3249
3250 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3251 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3252 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3253 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3254
3255 /* set line characteristics according configuration */
3256
3257 cy_writeb(base_addr + (CySCHR1 << index),
3258 START_CHAR(info->tty));
3259 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3260 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3261 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3262 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3263 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3264 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3265
3266 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3267 CyCOR3ch, index);
3268
3269 cy_writeb(base_addr + (CyCAR << index), (u_char) channel); /* !!! Is this needed? */
3270 cy_writeb(base_addr + (CyRTPR << index),
3271 (info->default_timeout ? info->default_timeout : 0x02));
3272 /* 10ms rx timeout */
3273
3274 if (C_CLOCAL(info->tty)) {
3275 /* without modem intr */
3276 cy_writeb(base_addr + (CySRER << index),
3277 cy_readb(base_addr +
3278 (CySRER << index)) | CyMdmCh);
3279 /* act on 1->0 modem transitions */
3280 if ((cflag & CRTSCTS) && info->rflow) {
3281 cy_writeb(base_addr + (CyMCOR1 << index),
3282 (CyCTS | rflow_thr[i]));
3283 } else {
3284 cy_writeb(base_addr + (CyMCOR1 << index),
3285 CyCTS);
3286 }
3287 /* act on 0->1 modem transitions */
3288 cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
1da177e4 3289 } else {
02f1175c
JS		 3290 /* without modem intr */
3291 cy_writeb(base_addr + (CySRER << index),
3292 cy_readb(base_addr +
3293 (CySRER << index)) | CyMdmCh);
3294 /* act on 1->0 modem transitions */
3295 if ((cflag & CRTSCTS) && info->rflow) {
3296 cy_writeb(base_addr + (CyMCOR1 << index),
3297 (CyDSR | CyCTS | CyRI | CyDCD |
3298 rflow_thr[i]));
3299 } else {
3300 cy_writeb(base_addr + (CyMCOR1 << index),
3301 CyDSR | CyCTS | CyRI | CyDCD);
3302 }
3303 /* act on 0->1 modem transitions */
3304 cy_writeb(base_addr + (CyMCOR2 << index),
3305 CyDSR | CyCTS | CyRI | CyDCD);
1da177e4 3306 }
02f1175c
JS		 3307
3308 if (i == 0) { /* baud rate is zero, turn off line */
3309 if (info->rtsdtr_inv) {
3310 cy_writeb(base_addr + (CyMSVR1 << index),
3311 ~CyRTS);
3312 } else {
3313 cy_writeb(base_addr + (CyMSVR2 << index),
3314 ~CyDTR);
3315 }
1da177e4 3316#ifdef CY_DEBUG_DTR
02f1175c
JS		 3317 printk("cyc:set_line_char dropping DTR\n");
3318 printk(" status: 0x%x, 0x%x\n",
3319 cy_readb(base_addr + (CyMSVR1 << index)),
3320 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 3321#endif
02f1175c
JS		 3322 } else {
3323 if (info->rtsdtr_inv) {
3324 cy_writeb(base_addr + (CyMSVR1 << index),
3325 CyRTS);
3326 } else {
3327 cy_writeb(base_addr + (CyMSVR2 << index),
3328 CyDTR);
3329 }
1da177e4 3330#ifdef CY_DEBUG_DTR
02f1175c
JS		 3331 printk("cyc:set_line_char raising DTR\n");
3332 printk(" status: 0x%x, 0x%x\n",
3333 cy_readb(base_addr + (CyMSVR1 << index)),
3334 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 3335#endif
02f1175c 3336 }
1da177e4 3337
02f1175c
JS		 3338 if (info->tty) {
3339 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3340 }
3341 CY_UNLOCK(info, flags);
1da177e4 3342
1da177e4 3343 } else {
02f1175c
JS		 3344 struct FIRM_ID __iomem *firm_id;
3345 struct ZFW_CTRL __iomem *zfw_ctrl;
3346 struct BOARD_CTRL __iomem *board_ctrl;
3347 struct CH_CTRL __iomem *ch_ctrl;
3348 struct BUF_CTRL __iomem *buf_ctrl;
3349 uclong sw_flow;
3350 int retval;
1da177e4 3351
02f1175c
JS		 3352 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3353 if (!ISZLOADED(cy_card[card])) {
3354 return;
3355 }
1da177e4 3356
02f1175c
JS		 3357 zfw_ctrl = cy_card[card].base_addr +
3358 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3359 board_ctrl = &zfw_ctrl->board_ctrl;
3360 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3361 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3362
3363 /* baud rate */
3364 baud = tty_get_baud_rate(info->tty);
3365 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3366 ASYNC_SPD_CUST) {
3367 if (info->custom_divisor)
3368 baud_rate = info->baud / info->custom_divisor;
3369 else
3370 baud_rate = info->baud;
3371 } else if (baud > CYZ_MAX_SPEED) {
3372 baud = CYZ_MAX_SPEED;
3373 }
3374 cy_writel(&ch_ctrl->comm_baud, baud);
3375
3376 if (baud == 134) {
3377 /* get it right for 134.5 baud */
3378 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3379 2;
3380 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3381 ASYNC_SPD_CUST) {
3382 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3383 baud_rate) + 2;
3384 } else if (baud) {
3385 info->timeout = (info->xmit_fifo_size * HZ * 15 /
3386 baud) + 2;
3387 /* this needs to be propagated into the card info */
3388 } else {
3389 info->timeout = 0;
3390 }
1da177e4 3391
02f1175c
JS		 3392 /* byte size and parity */
3393 switch (cflag & CSIZE) {
3394 case CS5:
3395 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3396 break;
3397 case CS6:
3398 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3399 break;
3400 case CS7:
3401 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3402 break;
3403 case CS8:
3404 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3405 break;
3406 }
3407 if (cflag & CSTOPB) {
3408 cy_writel(&ch_ctrl->comm_data_l,
3409 cy_readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3410 } else {
3411 cy_writel(&ch_ctrl->comm_data_l,
3412 cy_readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3413 }
3414 if (cflag & PARENB) {
3415 if (cflag & PARODD) {
3416 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3417 } else {
3418 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3419 }
3420 } else {
3421 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3422 }
1da177e4 3423
02f1175c
JS		 3424 /* CTS flow control flag */
3425 if (cflag & CRTSCTS) {
3426 cy_writel(&ch_ctrl->hw_flow,
3427 cy_readl(&ch_ctrl->
3428 hw_flow) | C_RS_CTS | C_RS_RTS);
3429 } else {
3430 cy_writel(&ch_ctrl->hw_flow,
3431 cy_readl(&ch_ctrl->
3432 hw_flow) & ~(C_RS_CTS | C_RS_RTS));
3433 }
3434 /* As the HW flow control is done in firmware, the driver
3435 doesn't need to care about it */
3436 info->flags &= ~ASYNC_CTS_FLOW;
3437
3438 /* XON/XOFF/XANY flow control flags */
3439 sw_flow = 0;
3440 if (iflag & IXON) {
3441 sw_flow |= C_FL_OXX;
3442 if (iflag & IXANY)
3443 sw_flow |= C_FL_OIXANY;
3444 }
3445 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3446
3447 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTL, 0L);
3448 if (retval != 0) {
3449 printk("cyc:set_line_char retval on ttyC%d was %x\n",
3450 info->line, retval);
3451 }
3452
3453 /* CD sensitivity */
3454 if (cflag & CLOCAL) {
3455 info->flags &= ~ASYNC_CHECK_CD;
3456 } else {
3457 info->flags |= ASYNC_CHECK_CD;
3458 }
1da177e4 3459
02f1175c
JS		 3460 if (baud == 0) { /* baud rate is zero, turn off line */
3461 cy_writel(&ch_ctrl->rs_control,
3462 cy_readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
1da177e4 3463#ifdef CY_DEBUG_DTR
02f1175c 3464 printk("cyc:set_line_char dropping Z DTR\n");
1da177e4 3465#endif
02f1175c
JS		 3466 } else {
3467 cy_writel(&ch_ctrl->rs_control,
3468 cy_readl(&ch_ctrl->rs_control) | C_RS_DTR);
1da177e4 3469#ifdef CY_DEBUG_DTR
02f1175c 3470 printk("cyc:set_line_char raising Z DTR\n");
1da177e4 3471#endif
02f1175c 3472 }
1da177e4 3473
02f1175c
JS		 3474 retval = cyz_issue_cmd(&cy_card[card], channel, C_CM_IOCTLM,0L);
3475 if (retval != 0) {
3476 printk("cyc:set_line_char(2) retval on ttyC%d was %x\n",
3477 info->line, retval);
3478 }
1da177e4 3479
02f1175c
JS		 3480 if (info->tty) {
3481 clear_bit(TTY_IO_ERROR, &info->tty->flags);
3482 }
1da177e4 3483 }
02f1175c 3484} /* set_line_char */
1da177e4
LT		 3485
3486static int
02f1175c
JS		 3487get_serial_info(struct cyclades_port *info,
3488 struct serial_struct __user * retinfo)
1da177e4 3489{
02f1175c
JS		 3490 struct serial_struct tmp;
3491 struct cyclades_card *cinfo = &cy_card[info->card];
1da177e4 3492
02f1175c
JS		 3493 if (!retinfo)
3494 return -EFAULT;
3495 memset(&tmp, 0, sizeof(tmp));
3496 tmp.type = info->type;
3497 tmp.line = info->line;
3498 tmp.port = info->card * 0x100 + info->line - cinfo->first_line;
3499 tmp.irq = cinfo->irq;
3500 tmp.flags = info->flags;
3501 tmp.close_delay = info->close_delay;
3502 tmp.baud_base = info->baud;
3503 tmp.custom_divisor = info->custom_divisor;
3504 tmp.hub6 = 0; /*!!! */
3505 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3506} /* get_serial_info */
1da177e4
LT		 3507
3508static int
02f1175c
JS		 3509set_serial_info(struct cyclades_port *info,
3510 struct serial_struct __user * new_info)
1da177e4 3511{
02f1175c
JS		 3512 struct serial_struct new_serial;
3513 struct cyclades_port old_info;
3514
3515 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3516 return -EFAULT;
3517 old_info = *info;
3518
3519 if (!capable(CAP_SYS_ADMIN)) {
3520 if (new_serial.close_delay != info->close_delay ||
3521 new_serial.baud_base != info->baud ||
3522 (new_serial.flags & ASYNC_FLAGS &
3523 ~ASYNC_USR_MASK) !=
3524 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3525 return -EPERM;
3526 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3527 (new_serial.flags & ASYNC_USR_MASK);
3528 info->baud = new_serial.baud_base;
3529 info->custom_divisor = new_serial.custom_divisor;
3530 goto check_and_exit;
3531 }
3532
3533 /*
3534 * OK, past this point, all the error checking has been done.
3535 * At this point, we start making changes.....
3536 */
3537
3538 info->baud = new_serial.baud_base;
3539 info->custom_divisor = new_serial.custom_divisor;
3540 info->flags = (info->flags & ~ASYNC_FLAGS) |
3541 (new_serial.flags & ASYNC_FLAGS);
3542 info->close_delay = new_serial.close_delay * HZ / 100;
3543 info->closing_wait = new_serial.closing_wait * HZ / 100;
1da177e4
LT		 3544
3545check_and_exit:
02f1175c
JS		 3546 if (info->flags & ASYNC_INITIALIZED) {
3547 set_line_char(info);
3548 return 0;
3549 } else {
3550 return startup(info);
3551 }
3552} /* set_serial_info */
1da177e4
LT		 3553
3554/*
3555 * get_lsr_info - get line status register info
3556 *
3557 * Purpose: Let user call ioctl() to get info when the UART physically
3558 * is emptied. On bus types like RS485, the transmitter must
3559 * release the bus after transmitting. This must be done when
3560 * the transmit shift register is empty, not be done when the
3561 * transmit holding register is empty. This functionality
3562 * allows an RS485 driver to be written in user space.
3563 */
02f1175c 3564static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
1da177e4 3565{
02f1175c
JS		 3566 int card, chip, channel, index;
3567 unsigned char status;
3568 unsigned int result;
3569 unsigned long flags;
3570 void __iomem *base_addr;
1da177e4 3571
02f1175c
JS		 3572 card = info->card;
3573 channel = (info->line) - (cy_card[card].first_line);
3574 if (!IS_CYC_Z(cy_card[card])) {
3575 chip = channel >> 2;
3576 channel &= 0x03;
3577 index = cy_card[card].bus_index;
3578 base_addr =
3579 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3580
3581 CY_LOCK(info, flags);
3582 status = cy_readb(base_addr + (CySRER << index)) &
3583 (CyTxRdy | CyTxMpty);
3584 CY_UNLOCK(info, flags);
3585 result = (status ? 0 : TIOCSER_TEMT);
3586 } else {
3587 /* Not supported yet */
3588 return -EINVAL;
3589 }
3590 return put_user(result, (unsigned long __user *)value);
1da177e4
LT		 3591}
3592
02f1175c 3593static int cy_tiocmget(struct tty_struct *tty, struct file *file)
1da177e4 3594{
02f1175c
JS		 3595 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3596 int card, chip, channel, index;
3597 void __iomem *base_addr;
3598 unsigned long flags;
3599 unsigned char status;
3600 unsigned long lstatus;
3601 unsigned int result;
3602 struct FIRM_ID __iomem *firm_id;
3603 struct ZFW_CTRL __iomem *zfw_ctrl;
3604 struct BOARD_CTRL __iomem *board_ctrl;
3605 struct CH_CTRL __iomem *ch_ctrl;
3606
3607 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3608 return -ENODEV;
1da177e4 3609
02f1175c
JS		 3610 card = info->card;
3611 channel = (info->line) - (cy_card[card].first_line);
3612 if (!IS_CYC_Z(cy_card[card])) {
3613 chip = channel >> 2;
3614 channel &= 0x03;
3615 index = cy_card[card].bus_index;
3616 base_addr =
3617 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3618
02f1175c
JS		 3619 CY_LOCK(info, flags);
3620 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3621 status = cy_readb(base_addr + (CyMSVR1 << index));
3622 status |= cy_readb(base_addr + (CyMSVR2 << index));
3623 CY_UNLOCK(info, flags);
3624
3625 if (info->rtsdtr_inv) {
3626 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3627 ((status & CyDTR) ? TIOCM_RTS : 0);
3628 } else {
3629 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3630 ((status & CyDTR) ? TIOCM_DTR : 0);
3631 }
3632 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3633 ((status & CyRI) ? TIOCM_RNG : 0) |
3634 ((status & CyDSR) ? TIOCM_DSR : 0) |
3635 ((status & CyCTS) ? TIOCM_CTS : 0);
1da177e4 3636 } else {
02f1175c 3637 base_addr = cy_card[card].base_addr;
1da177e4 3638
02f1175c
JS		 3639 if (cy_card[card].num_chips != -1) {
3640 return -EINVAL;
3641 }
1da177e4 3642
02f1175c
JS		 3643 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3644 if (ISZLOADED(cy_card[card])) {
3645 zfw_ctrl = cy_card[card].base_addr +
3646 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3647 board_ctrl = &zfw_ctrl->board_ctrl;
3648 ch_ctrl = zfw_ctrl->ch_ctrl;
3649 lstatus = cy_readl(&ch_ctrl[channel].rs_status);
3650 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3651 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3652 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3653 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3654 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3655 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3656 } else {
3657 result = 0;
3658 return -ENODEV;
3659 }
1da177e4 3660
02f1175c
JS		 3661 }
3662 return result;
3663} /* cy_tiomget */
1da177e4
LT		 3664
3665static int
3666cy_tiocmset(struct tty_struct *tty, struct file *file,
02f1175c 3667 unsigned int set, unsigned int clear)
1da177e4 3668{
02f1175c
JS		 3669 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3670 int card, chip, channel, index;
3671 void __iomem *base_addr;
3672 unsigned long flags;
3673 struct FIRM_ID __iomem *firm_id;
3674 struct ZFW_CTRL __iomem *zfw_ctrl;
3675 struct BOARD_CTRL __iomem *board_ctrl;
3676 struct CH_CTRL __iomem *ch_ctrl;
3677 int retval;
3678
3679 if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3680 return -ENODEV;
3681
3682 card = info->card;
3683 channel = (info->line) - (cy_card[card].first_line);
3684 if (!IS_CYC_Z(cy_card[card])) {
3685 chip = channel >> 2;
3686 channel &= 0x03;
3687 index = cy_card[card].bus_index;
3688 base_addr =
3689 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3690
3691 if (set & TIOCM_RTS) {
3692 CY_LOCK(info, flags);
3693 cy_writeb(base_addr + (CyCAR << index),
3694 (u_char) channel);
3695 if (info->rtsdtr_inv) {
3696 cy_writeb(base_addr + (CyMSVR2 << index),
3697 CyDTR);
3698 } else {
3699 cy_writeb(base_addr + (CyMSVR1 << index),
3700 CyRTS);
3701 }
3702 CY_UNLOCK(info, flags);
3703 }
3704 if (clear & TIOCM_RTS) {
3705 CY_LOCK(info, flags);
3706 cy_writeb(base_addr + (CyCAR << index),
3707 (u_char) channel);
3708 if (info->rtsdtr_inv) {
3709 cy_writeb(base_addr + (CyMSVR2 << index),
3710 ~CyDTR);
3711 } else {
3712 cy_writeb(base_addr + (CyMSVR1 << index),
3713 ~CyRTS);
3714 }
3715 CY_UNLOCK(info, flags);
3716 }
3717 if (set & TIOCM_DTR) {
3718 CY_LOCK(info, flags);
3719 cy_writeb(base_addr + (CyCAR << index),
3720 (u_char) channel);
3721 if (info->rtsdtr_inv) {
3722 cy_writeb(base_addr + (CyMSVR1 << index),
3723 CyRTS);
3724 } else {
3725 cy_writeb(base_addr + (CyMSVR2 << index),
3726 CyDTR);
3727 }
1da177e4 3728#ifdef CY_DEBUG_DTR
02f1175c
JS		 3729 printk("cyc:set_modem_info raising DTR\n");
3730 printk(" status: 0x%x, 0x%x\n",
3731 cy_readb(base_addr + (CyMSVR1 << index)),
3732 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 3733#endif
02f1175c
JS		 3734 CY_UNLOCK(info, flags);
3735 }
3736 if (clear & TIOCM_DTR) {
3737 CY_LOCK(info, flags);
3738 cy_writeb(base_addr + (CyCAR << index),
3739 (u_char) channel);
3740 if (info->rtsdtr_inv) {
3741 cy_writeb(base_addr + (CyMSVR1 << index),
3742 ~CyRTS);
3743 } else {
3744 cy_writeb(base_addr + (CyMSVR2 << index),
3745 ~CyDTR);
3746 }
1da177e4
LT		 3747
3748#ifdef CY_DEBUG_DTR
02f1175c
JS		 3749 printk("cyc:set_modem_info dropping DTR\n");
3750 printk(" status: 0x%x, 0x%x\n",
3751 cy_readb(base_addr + (CyMSVR1 << index)),
3752 cy_readb(base_addr + (CyMSVR2 << index)));
1da177e4 3753#endif
02f1175c
JS		 3754 CY_UNLOCK(info, flags);
3755 }
3756 } else {
3757 base_addr = cy_card[card].base_addr;
3758
3759 firm_id = cy_card[card].base_addr + ID_ADDRESS;
3760 if (ISZLOADED(cy_card[card])) {
3761 zfw_ctrl = cy_card[card].base_addr +
3762 (cy_readl(&firm_id->zfwctrl_addr) & 0xfffff);
3763 board_ctrl = &zfw_ctrl->board_ctrl;
3764 ch_ctrl = zfw_ctrl->ch_ctrl;
3765
3766 if (set & TIOCM_RTS) {
3767 CY_LOCK(info, flags);
3768 cy_writel(&ch_ctrl[channel].rs_control,
3769 cy_readl(&ch_ctrl[channel].
3770 rs_control) | C_RS_RTS);
3771 CY_UNLOCK(info, flags);
3772 }
3773 if (clear & TIOCM_RTS) {
3774 CY_LOCK(info, flags);
3775 cy_writel(&ch_ctrl[channel].rs_control,
3776 cy_readl(&ch_ctrl[channel].
3777 rs_control) & ~C_RS_RTS);
3778 CY_UNLOCK(info, flags);
3779 }
3780 if (set & TIOCM_DTR) {
3781 CY_LOCK(info, flags);
3782 cy_writel(&ch_ctrl[channel].rs_control,
3783 cy_readl(&ch_ctrl[channel].
3784 rs_control) | C_RS_DTR);
1da177e4 3785#ifdef CY_DEBUG_DTR
02f1175c 3786 printk("cyc:set_modem_info raising Z DTR\n");
1da177e4 3787#endif
02f1175c
JS		 3788 CY_UNLOCK(info, flags);
3789 }
3790 if (clear & TIOCM_DTR) {
3791 CY_LOCK(info, flags);
3792 cy_writel(&ch_ctrl[channel].rs_control,
3793 cy_readl(&ch_ctrl[channel].
3794 rs_control) & ~C_RS_DTR);
1da177e4 3795#ifdef CY_DEBUG_DTR
02f1175c 3796 printk("cyc:set_modem_info clearing Z DTR\n");
1da177e4 3797#endif
02f1175c
JS		 3798 CY_UNLOCK(info, flags);
3799 }
3800 } else {
3801 return -ENODEV;
3802 }
3803 CY_LOCK(info, flags);
3804 retval = cyz_issue_cmd(&cy_card[info->card],
3805 channel, C_CM_IOCTLM, 0L);
3806 if (retval != 0) {
3807 printk("cyc:set_modem_info retval on ttyC%d was %x\n",
3808 info->line, retval);
3809 }
3810 CY_UNLOCK(info, flags);
1da177e4 3811 }
02f1175c
JS		 3812 return 0;
3813} /* cy_tiocmset */
1da177e4
LT		 3814
3815/*
3816 * cy_break() --- routine which turns the break handling on or off
3817 */
02f1175c 3818static void cy_break(struct tty_struct *tty, int break_state)
1da177e4 3819{
02f1175c
JS		 3820 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
3821 unsigned long flags;
1da177e4 3822
02f1175c
JS		 3823 if (serial_paranoia_check(info, tty->name, "cy_break"))
3824 return;
1da177e4 3825
02f1175c
JS		 3826 CY_LOCK(info, flags);
3827 if (!IS_CYC_Z(cy_card[info->card])) {
3828 /* Let the transmit ISR take care of this (since it
3829 requires stuffing characters into the output stream).
3830 */
3831 if (break_state == -1) {
3832 if (!info->breakon) {
3833 info->breakon = 1;
3834 if (!info->xmit_cnt) {
3835 CY_UNLOCK(info, flags);
3836 start_xmit(info);
3837 CY_LOCK(info, flags);
3838 }
3839 }
3840 } else {
3841 if (!info->breakoff) {
3842 info->breakoff = 1;
3843 if (!info->xmit_cnt) {
3844 CY_UNLOCK(info, flags);
3845 start_xmit(info);
3846 CY_LOCK(info, flags);
3847 }
3848 }
1da177e4 3849 }
1da177e4 3850 } else {
02f1175c
JS		 3851 int retval;
3852
3853 if (break_state == -1) {
3854 retval = cyz_issue_cmd(&cy_card[info->card],
3855 info->line - cy_card[info->card].first_line,
3856 C_CM_SET_BREAK, 0L);
3857 if (retval != 0) {
3858 printk("cyc:cy_break (set) retval on ttyC%d "
3859 "was %x\n", info->line, retval);
3860 }
3861 } else {
3862 retval = cyz_issue_cmd(&cy_card[info->card],
3863 info->line - cy_card[info->card].first_line,
3864 C_CM_CLR_BREAK, 0L);
3865 if (retval != 0) {
3866 printk("cyc:cy_break (clr) retval on ttyC%d "
3867 "was %x\n", info->line, retval);
3868 }
1da177e4 3869 }
1da177e4 3870 }
02f1175c
JS		 3871 CY_UNLOCK(info, flags);
3872} /* cy_break */
1da177e4
LT		 3873
3874static int
02f1175c 3875get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
1da177e4
LT		 3876{
3877
02f1175c
JS		 3878 if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3879 return -EFAULT;
3880 info->mon.int_count = 0;
3881 info->mon.char_count = 0;
3882 info->mon.char_max = 0;
3883 info->mon.char_last = 0;
3884 return 0;
3885} /* get_mon_info */
1da177e4 3886
02f1175c 3887static int set_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3888{
02f1175c
JS		 3889 void __iomem *base_addr;
3890 int card, channel, chip, index;
3891 unsigned long flags;
1da177e4 3892
02f1175c
JS		 3893 card = info->card;
3894 channel = info->line - cy_card[card].first_line;
3895 if (!IS_CYC_Z(cy_card[card])) {
3896 chip = channel >> 2;
3897 channel &= 0x03;
3898 index = cy_card[card].bus_index;
3899 base_addr =
3900 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3901
3902 info->cor3 &= ~CyREC_FIFO;
3903 info->cor3 |= value & CyREC_FIFO;
1da177e4 3904
02f1175c
JS		 3905 CY_LOCK(info, flags);
3906 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3907 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3908 CY_UNLOCK(info, flags);
3909 } else {
096dcfce 3910 /* Nothing to do! */
02f1175c
JS		 3911 }
3912 return 0;
3913} /* set_threshold */
1da177e4
LT		 3914
3915static int
02f1175c 3916get_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3917{
02f1175c
JS		 3918 void __iomem *base_addr;
3919 int card, channel, chip, index;
3920 unsigned long tmp;
1da177e4 3921
02f1175c
JS		 3922 card = info->card;
3923 channel = info->line - cy_card[card].first_line;
3924 if (!IS_CYC_Z(cy_card[card])) {
3925 chip = channel >> 2;
3926 channel &= 0x03;
3927 index = cy_card[card].bus_index;
3928 base_addr =
3929 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3930
3931 tmp = cy_readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3932 return put_user(tmp, value);
3933 } else {
096dcfce 3934 /* Nothing to do! */
02f1175c
JS		 3935 return 0;
3936 }
3937} /* get_threshold */
1da177e4
LT		 3938
3939static int
02f1175c 3940set_default_threshold(struct cyclades_port *info, unsigned long value)
1da177e4 3941{
02f1175c
JS		 3942 info->default_threshold = value & 0x0f;
3943 return 0;
3944} /* set_default_threshold */
1da177e4
LT		 3945
3946static int
02f1175c 3947get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3948{
02f1175c
JS		 3949 return put_user(info->default_threshold, value);
3950} /* get_default_threshold */
1da177e4 3951
02f1175c 3952static int set_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 3953{
02f1175c
JS		 3954 void __iomem *base_addr;
3955 int card, channel, chip, index;
3956 unsigned long flags;
1da177e4 3957
02f1175c
JS		 3958 card = info->card;
3959 channel = info->line - cy_card[card].first_line;
3960 if (!IS_CYC_Z(cy_card[card])) {
3961 chip = channel >> 2;
3962 channel &= 0x03;
3963 index = cy_card[card].bus_index;
3964 base_addr =
3965 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
1da177e4 3966
02f1175c
JS		 3967 CY_LOCK(info, flags);
3968 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3969 CY_UNLOCK(info, flags);
3970 } else {
096dcfce 3971 /* Nothing to do! */
02f1175c
JS		 3972 }
3973 return 0;
3974} /* set_timeout */
1da177e4 3975
02f1175c 3976static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 3977{
02f1175c
JS		 3978 void __iomem *base_addr;
3979 int card, channel, chip, index;
3980 unsigned long tmp;
1da177e4 3981
02f1175c
JS		 3982 card = info->card;
3983 channel = info->line - cy_card[card].first_line;
3984 if (!IS_CYC_Z(cy_card[card])) {
3985 chip = channel >> 2;
3986 channel &= 0x03;
3987 index = cy_card[card].bus_index;
3988 base_addr =
3989 cy_card[card].base_addr + (cy_chip_offset[chip] << index);
3990
3991 tmp = cy_readb(base_addr + (CyRTPR << index));
3992 return put_user(tmp, value);
3993 } else {
096dcfce 3994 /* Nothing to do! */
02f1175c
JS		 3995 return 0;
3996 }
3997} /* get_timeout */
1da177e4 3998
02f1175c 3999static int set_default_timeout(struct cyclades_port *info, unsigned long value)
1da177e4 4000{
02f1175c
JS		 4001 info->default_timeout = value & 0xff;
4002 return 0;
4003} /* set_default_timeout */
1da177e4
LT		 4004
4005static int
02f1175c 4006get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
1da177e4 4007{
02f1175c
JS		 4008 return put_user(info->default_timeout, value);
4009} /* get_default_timeout */
1da177e4
LT		 4010
4011/*
4012 * This routine allows the tty driver to implement device-
4013 * specific ioctl's. If the ioctl number passed in cmd is
4014 * not recognized by the driver, it should return ENOIOCTLCMD.
4015 */
4016static int
02f1175c
JS		 4017cy_ioctl(struct tty_struct *tty, struct file *file,
4018 unsigned int cmd, unsigned long arg)
1da177e4 4019{
02f1175c
JS		 4020 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4021 struct cyclades_icount cprev, cnow; /* kernel counter temps */
4022 struct serial_icounter_struct __user *p_cuser; /* user space */
4023 int ret_val = 0;
4024 unsigned long flags;
4025 void __user *argp = (void __user *)arg;
4026
4027 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4028 return -ENODEV;
1da177e4
LT		 4029
4030#ifdef CY_DEBUG_OTHER
02f1175c 4031 printk("cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n", info->line, cmd, arg); /* */
1da177e4
LT		 4032#endif
4033
02f1175c
JS		 4034 switch (cmd) {
4035 case CYGETMON:
4036 ret_val = get_mon_info(info, argp);
4037 break;
4038 case CYGETTHRESH:
4039 ret_val = get_threshold(info, argp);
4040 break;
4041 case CYSETTHRESH:
4042 ret_val = set_threshold(info, arg);
4043 break;
4044 case CYGETDEFTHRESH:
4045 ret_val = get_default_threshold(info, argp);
4046 break;
4047 case CYSETDEFTHRESH:
4048 ret_val = set_default_threshold(info, arg);
4049 break;
4050 case CYGETTIMEOUT:
4051 ret_val = get_timeout(info, argp);
4052 break;
4053 case CYSETTIMEOUT:
4054 ret_val = set_timeout(info, arg);
4055 break;
4056 case CYGETDEFTIMEOUT:
4057 ret_val = get_default_timeout(info, argp);
4058 break;
4059 case CYSETDEFTIMEOUT:
4060 ret_val = set_default_timeout(info, arg);
4061 break;
1da177e4 4062 case CYSETRFLOW:
02f1175c
JS		 4063 info->rflow = (int)arg;
4064 ret_val = 0;
4065 break;
1da177e4 4066 case CYGETRFLOW:
02f1175c
JS		 4067 ret_val = info->rflow;
4068 break;
1da177e4 4069 case CYSETRTSDTR_INV:
02f1175c
JS		 4070 info->rtsdtr_inv = (int)arg;
4071 ret_val = 0;
4072 break;
1da177e4 4073 case CYGETRTSDTR_INV:
02f1175c
JS		 4074 ret_val = info->rtsdtr_inv;
4075 break;
1da177e4 4076 case CYGETCARDINFO:
02f1175c
JS		 4077 if (copy_to_user(argp, &cy_card[info->card],
4078 sizeof(struct cyclades_card))) {
4079 ret_val = -EFAULT;
4080 break;
4081 }
4082 ret_val = 0;
1da177e4 4083 break;
1da177e4 4084 case CYGETCD1400VER:
02f1175c
JS		 4085 ret_val = info->chip_rev;
4086 break;
1da177e4
LT		 4087#ifndef CONFIG_CYZ_INTR
4088 case CYZSETPOLLCYCLE:
02f1175c
JS		 4089 cyz_polling_cycle = (arg * HZ) / 1000;
4090 ret_val = 0;
4091 break;
1da177e4 4092 case CYZGETPOLLCYCLE:
02f1175c
JS		 4093 ret_val = (cyz_polling_cycle * 1000) / HZ;
4094 break;
4095#endif /* CONFIG_CYZ_INTR */
1da177e4 4096 case CYSETWAIT:
02f1175c
JS		 4097 info->closing_wait = (unsigned short)arg *HZ / 100;
4098 ret_val = 0;
4099 break;
1da177e4 4100 case CYGETWAIT:
02f1175c
JS		 4101 ret_val = info->closing_wait / (HZ / 100);
4102 break;
4103 case TIOCGSERIAL:
4104 ret_val = get_serial_info(info, argp);
4105 break;
4106 case TIOCSSERIAL:
4107 ret_val = set_serial_info(info, argp);
4108 break;
4109 case TIOCSERGETLSR: /* Get line status register */
4110 ret_val = get_lsr_info(info, argp);
4111 break;
4112 /*
4113 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4114 * - mask passed in arg for lines of interest
4115 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4116 * Caller should use TIOCGICOUNT to see which one it was
4117 */
1da177e4 4118 case TIOCMIWAIT:
1da177e4 4119 CY_LOCK(info, flags);
02f1175c
JS		 4120 /* note the counters on entry */
4121 cprev = info->icount;
1da177e4 4122 CY_UNLOCK(info, flags);
02f1175c
JS		 4123 while (1) {
4124 interruptible_sleep_on(&info->delta_msr_wait);
4125 /* see if a signal did it */
4126 if (signal_pending(current)) {
4127 return -ERESTARTSYS;
4128 }
1da177e4 4129
02f1175c
JS		 4130 CY_LOCK(info, flags);
4131 cnow = info->icount; /* atomic copy */
4132 CY_UNLOCK(info, flags);
4133
4134 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4135 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4136 return -EIO; /* no change => error */
4137 }
4138 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4139 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4140 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4141 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4142 return 0;
4143 }
4144 cprev = cnow;
1da177e4 4145 }
02f1175c 4146 /* NOTREACHED */
1da177e4 4147
02f1175c
JS		 4148 /*
4149 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4150 * Return: write counters to the user passed counter struct
4151 * NB: both 1->0 and 0->1 transitions are counted except for
4152 * RI where only 0->1 is counted.
4153 */
1da177e4 4154 case TIOCGICOUNT:
02f1175c
JS		 4155 CY_LOCK(info, flags);
4156 cnow = info->icount;
4157 CY_UNLOCK(info, flags);
4158 p_cuser = argp;
4159 ret_val = put_user(cnow.cts, &p_cuser->cts);
4160 if (ret_val)
4161 return ret_val;
4162 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4163 if (ret_val)
4164 return ret_val;
4165 ret_val = put_user(cnow.rng, &p_cuser->rng);
4166 if (ret_val)
4167 return ret_val;
4168 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4169 if (ret_val)
4170 return ret_val;
4171 ret_val = put_user(cnow.rx, &p_cuser->rx);
4172 if (ret_val)
4173 return ret_val;
4174 ret_val = put_user(cnow.tx, &p_cuser->tx);
4175 if (ret_val)
4176 return ret_val;
4177 ret_val = put_user(cnow.frame, &p_cuser->frame);
4178 if (ret_val)
4179 return ret_val;
4180 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4181 if (ret_val)
4182 return ret_val;
4183 ret_val = put_user(cnow.parity, &p_cuser->parity);
4184 if (ret_val)
4185 return ret_val;
4186 ret_val = put_user(cnow.brk, &p_cuser->brk);
4187 if (ret_val)
4188 return ret_val;
4189 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4190 if (ret_val)
4191 return ret_val;
4192 ret_val = 0;
4193 break;
4194 default:
4195 ret_val = -ENOIOCTLCMD;
4196 }
1da177e4
LT		 4197
4198#ifdef CY_DEBUG_OTHER
02f1175c 4199 printk(" cyc:cy_ioctl done\n");
1da177e4
LT		 4200#endif
4201
02f1175c
JS		 4202 return ret_val;
4203} /* cy_ioctl */
1da177e4
LT		 4204
4205/*
4206 * This routine allows the tty driver to be notified when
4207 * device's termios settings have changed. Note that a
4208 * well-designed tty driver should be prepared to accept the case
4209 * where old == NULL, and try to do something rational.
4210 */
02f1175c 4211static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 4212{
02f1175c 4213 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1da177e4
LT		 4214
4215#ifdef CY_DEBUG_OTHER
02f1175c 4216 printk("cyc:cy_set_termios ttyC%d\n", info->line);
1da177e4
LT		 4217#endif
4218
02f1175c
JS		 4219 if (tty->termios->c_cflag == old_termios->c_cflag &&
4220 (tty->termios->c_iflag & (IXON | IXANY)) ==
4221 (old_termios->c_iflag & (IXON | IXANY)))
4222 return;
4223 set_line_char(info);
4224
4225 if ((old_termios->c_cflag & CRTSCTS) &&
4226 !(tty->termios->c_cflag & CRTSCTS)) {
4227 tty->hw_stopped = 0;
4228 cy_start(tty);
4229 }
1da177e4 4230#if 0
02f1175c
JS		 4231 /*
4232 * No need to wake up processes in open wait, since they
4233 * sample the CLOCAL flag once, and don't recheck it.
4234 * XXX It's not clear whether the current behavior is correct
4235 * or not. Hence, this may change.....
4236 */
4237 if (!(old_termios->c_cflag & CLOCAL) &&
4238 (tty->termios->c_cflag & CLOCAL))
4239 wake_up_interruptible(&info->open_wait);
1da177e4 4240#endif
02f1175c 4241} /* cy_set_termios */
1da177e4
LT		 4242
4243/* This function is used to send a high-priority XON/XOFF character to
4244 the device.
4245*/
02f1175c 4246static void cy_send_xchar(struct tty_struct *tty, char ch)
1da177e4 4247{
02f1175c 4248 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
1da177e4
LT		 4249 int card, channel;
4250
02f1175c 4251 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
1da177e4
LT		 4252 return;
4253
02f1175c 4254 info->x_char = ch;
1da177e4
LT		 4255
4256 if (ch)
02f1175c 4257 cy_start(tty);
1da177e4
LT		 4258
4259 card = info->card;
4260 channel = info->line - cy_card[card].first_line;
4261
02f1175c
JS		 4262 if (IS_CYC_Z(cy_card[card])) {
4263 if (ch == STOP_CHAR(tty))
4264 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXOFF,
4265 0L);
4266 else if (ch == START_CHAR(tty))
4267 cyz_issue_cmd(&cy_card[card], channel, C_CM_SENDXON,
4268 0L);
1da177e4
LT		 4269 }
4270}
4271
4272/* This routine is called by the upper-layer tty layer to signal
4273 that incoming characters should be throttled because the input
4274 buffers are close to full.
4275 */
02f1175c 4276static void cy_throttle(struct tty_struct *tty)
1da177e4 4277{
02f1175c
JS		 4278 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4279 unsigned long flags;
4280 void __iomem *base_addr;
4281 int card, chip, channel, index;
1da177e4
LT		 4282
4283#ifdef CY_DEBUG_THROTTLE
02f1175c 4284 char buf[64];
1da177e4 4285
02f1175c
JS		 4286 printk("cyc:throttle %s: %d....ttyC%d\n", tty_name(tty, buf),
4287 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4288#endif
4289
02f1175c
JS		 4290 if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4291 return;
4292 }
4293
4294 card = info->card;
4295
4296 if (I_IXOFF(tty)) {
4297 if (!IS_CYC_Z(cy_card[card]))
4298 cy_send_xchar(tty, STOP_CHAR(tty));
4299 else
4300 info->throttle = 1;
4301 }
1da177e4 4302
02f1175c
JS		 4303 if (tty->termios->c_cflag & CRTSCTS) {
4304 channel = info->line - cy_card[card].first_line;
4305 if (!IS_CYC_Z(cy_card[card])) {
4306 chip = channel >> 2;
4307 channel &= 0x03;
4308 index = cy_card[card].bus_index;
4309 base_addr = cy_card[card].base_addr +
4310 (cy_chip_offset[chip] << index);
4311
4312 CY_LOCK(info, flags);
4313 cy_writeb(base_addr + (CyCAR << index),
4314 (u_char) channel);
4315 if (info->rtsdtr_inv) {
4316 cy_writeb(base_addr + (CyMSVR2 << index),
4317 ~CyDTR);
4318 } else {
4319 cy_writeb(base_addr + (CyMSVR1 << index),
4320 ~CyRTS);
4321 }
4322 CY_UNLOCK(info, flags);
4323 } else {
4324 info->throttle = 1;
4325 }
4326 }
02f1175c 4327} /* cy_throttle */
1da177e4
LT		 4328
4329/*
4330 * This routine notifies the tty driver that it should signal
4331 * that characters can now be sent to the tty without fear of
4332 * overrunning the input buffers of the line disciplines.
4333 */
02f1175c 4334static void cy_unthrottle(struct tty_struct *tty)
1da177e4 4335{
02f1175c
JS		 4336 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4337 unsigned long flags;
4338 void __iomem *base_addr;
4339 int card, chip, channel, index;
1da177e4
LT		 4340
4341#ifdef CY_DEBUG_THROTTLE
02f1175c
JS		 4342 char buf[64];
4343
4344 printk("cyc:unthrottle %s: %d....ttyC%d\n", tty_name(tty, buf),
4345 tty->ldisc.chars_in_buffer(tty), info->line);
1da177e4
LT		 4346#endif
4347
02f1175c
JS		 4348 if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4349 return;
4350 }
1da177e4 4351
02f1175c
JS		 4352 if (I_IXOFF(tty)) {
4353 if (info->x_char)
4354 info->x_char = 0;
4355 else
4356 cy_send_xchar(tty, START_CHAR(tty));
1da177e4 4357 }
1da177e4 4358
02f1175c
JS		 4359 if (tty->termios->c_cflag & CRTSCTS) {
4360 card = info->card;
4361 channel = info->line - cy_card[card].first_line;
4362 if (!IS_CYC_Z(cy_card[card])) {
4363 chip = channel >> 2;
4364 channel &= 0x03;
4365 index = cy_card[card].bus_index;
4366 base_addr = cy_card[card].base_addr +
4367 (cy_chip_offset[chip] << index);
4368
4369 CY_LOCK(info, flags);
4370 cy_writeb(base_addr + (CyCAR << index),
4371 (u_char) channel);
4372 if (info->rtsdtr_inv) {
4373 cy_writeb(base_addr + (CyMSVR2 << index),
4374 CyDTR);
4375 } else {
4376 cy_writeb(base_addr + (CyMSVR1 << index),
4377 CyRTS);
4378 }
4379 CY_UNLOCK(info, flags);
4380 } else {
4381 info->throttle = 0;
4382 }
4383 }
02f1175c 4384} /* cy_unthrottle */
1da177e4
LT		 4385
4386/* cy_start and cy_stop provide software output flow control as a
4387 function of XON/XOFF, software CTS, and other such stuff.
4388*/
02f1175c 4389static void cy_stop(struct tty_struct *tty)
1da177e4 4390{
02f1175c
JS		 4391 struct cyclades_card *cinfo;
4392 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4393 void __iomem *base_addr;
4394 int chip, channel, index;
4395 unsigned long flags;
1da177e4
LT		 4396
4397#ifdef CY_DEBUG_OTHER
02f1175c 4398 printk("cyc:cy_stop ttyC%d\n", info->line); /* */
1da177e4
LT		 4399#endif
4400
02f1175c
JS		 4401 if (serial_paranoia_check(info, tty->name, "cy_stop"))
4402 return;
1da177e4 4403
02f1175c
JS		 4404 cinfo = &cy_card[info->card];
4405 channel = info->line - cinfo->first_line;
4406 if (!IS_CYC_Z(*cinfo)) {
4407 index = cinfo->bus_index;
4408 chip = channel >> 2;
4409 channel &= 0x03;
4410 base_addr = cy_card[info->card].base_addr +
4411 (cy_chip_offset[chip] << index);
1da177e4 4412
02f1175c
JS		 4413 CY_LOCK(info, flags);
4414 cy_writeb(base_addr + (CyCAR << index),
4415 (u_char)(channel & 0x0003)); /* index channel */
4416 cy_writeb(base_addr + (CySRER << index),
4417 cy_readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4418 CY_UNLOCK(info, flags);
4419 } else {
096dcfce 4420 /* Nothing to do! */
02f1175c 4421 }
02f1175c 4422} /* cy_stop */
1da177e4 4423
02f1175c 4424static void cy_start(struct tty_struct *tty)
1da177e4 4425{
02f1175c
JS		 4426 struct cyclades_card *cinfo;
4427 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4428 void __iomem *base_addr;
4429 int chip, channel, index;
4430 unsigned long flags;
1da177e4
LT		 4431
4432#ifdef CY_DEBUG_OTHER
02f1175c 4433 printk("cyc:cy_start ttyC%d\n", info->line); /* */
1da177e4
LT		 4434#endif
4435
02f1175c
JS		 4436 if (serial_paranoia_check(info, tty->name, "cy_start"))
4437 return;
1da177e4 4438
02f1175c
JS		 4439 cinfo = &cy_card[info->card];
4440 channel = info->line - cinfo->first_line;
4441 index = cinfo->bus_index;
4442 if (!IS_CYC_Z(*cinfo)) {
4443 chip = channel >> 2;
4444 channel &= 0x03;
4445 base_addr = cy_card[info->card].base_addr +
4446 (cy_chip_offset[chip] << index);
1da177e4 4447
02f1175c
JS		 4448 CY_LOCK(info, flags);
4449 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003)); /* index channel */
4450 cy_writeb(base_addr + (CySRER << index),
4451 cy_readb(base_addr + (CySRER << index)) | CyTxRdy);
4452 CY_UNLOCK(info, flags);
4453 } else {
096dcfce 4454 /* Nothing to do! */
02f1175c 4455 }
02f1175c 4456} /* cy_start */
1da177e4 4457
02f1175c 4458static void cy_flush_buffer(struct tty_struct *tty)
1da177e4 4459{
02f1175c
JS		 4460 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4461 int card, channel, retval;
4462 unsigned long flags;
4463
1da177e4 4464#ifdef CY_DEBUG_IO
02f1175c 4465 printk("cyc:cy_flush_buffer ttyC%d\n", info->line); /* */
1da177e4
LT		 4466#endif
4467
02f1175c
JS		 4468 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4469 return;
1da177e4 4470
02f1175c
JS		 4471 card = info->card;
4472 channel = (info->line) - (cy_card[card].first_line);
1da177e4 4473
1da177e4 4474 CY_LOCK(info, flags);
02f1175c 4475 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1da177e4 4476 CY_UNLOCK(info, flags);
1da177e4 4477
02f1175c
JS		 4478 if (IS_CYC_Z(cy_card[card])) { /* If it is a Z card, flush the on-board
4479 buffers as well */
4480 CY_LOCK(info, flags);
4481 retval =
4482 cyz_issue_cmd(&cy_card[card], channel, C_CM_FLUSH_TX, 0L);
4483 if (retval != 0) {
4484 printk("cyc: flush_buffer retval on ttyC%d was %x\n",
4485 info->line, retval);
4486 }
4487 CY_UNLOCK(info, flags);
4488 }
4489 tty_wakeup(tty);
4490 wake_up_interruptible(&tty->write_wait);
4491} /* cy_flush_buffer */
1da177e4
LT		 4492
4493/*
4494 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4495 */
02f1175c 4496static void cy_hangup(struct tty_struct *tty)
1da177e4 4497{
02f1175c
JS		 4498 struct cyclades_port *info = (struct cyclades_port *)tty->driver_data;
4499
1da177e4 4500#ifdef CY_DEBUG_OTHER
02f1175c 4501 printk("cyc:cy_hangup ttyC%d\n", info->line); /* */
1da177e4
LT		 4502#endif
4503
02f1175c
JS		 4504 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4505 return;
1da177e4 4506
02f1175c
JS		 4507 cy_flush_buffer(tty);
4508 shutdown(info);
4509 info->event = 0;
4510 info->count = 0;
1da177e4 4511#ifdef CY_DEBUG_COUNT
02f1175c 4512 printk("cyc:cy_hangup (%d): setting count to 0\n", current->pid);
1da177e4 4513#endif
02f1175c
JS		 4514 info->tty = NULL;
4515 info->flags &= ~ASYNC_NORMAL_ACTIVE;
4516 wake_up_interruptible(&info->open_wait);
4517} /* cy_hangup */
1da177e4
LT		 4518
4519/*
4520 * ---------------------------------------------------------------------
4521 * cy_init() and friends
4522 *
4523 * cy_init() is called at boot-time to initialize the serial driver.
4524 * ---------------------------------------------------------------------
4525 */
4526
4527/* initialize chips on Cyclom-Y card -- return number of valid
4528 chips (which is number of ports/4) */
4529static unsigned short __init
02f1175c 4530cyy_init_card(void __iomem * true_base_addr, int index)
1da177e4 4531{
02f1175c
JS		 4532 unsigned int chip_number;
4533 void __iomem *base_addr;
4534
4535 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4536 /* Cy_HwReset is 0x1400 */
4537 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4538 /* Cy_ClrIntr is 0x1800 */
4539 udelay(500L);
4540
4541 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4542 base_addr =
4543 true_base_addr + (cy_chip_offset[chip_number] << index);
4544 mdelay(1);
4545 if (cy_readb(base_addr + (CyCCR << index)) != 0x00) {
4546 /*************
4547 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4548 chip_number, (unsigned long)base_addr);
4549 *************/
4550 return chip_number;
4551 }
4552
4553 cy_writeb(base_addr + (CyGFRCR << index), 0);
4554 udelay(10L);
4555
4556 /* The Cyclom-16Y does not decode address bit 9 and therefore
4557 cannot distinguish between references to chip 0 and a non-
4558 existent chip 4. If the preceding clearing of the supposed
4559 chip 4 GFRCR register appears at chip 0, there is no chip 4
4560 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4561 */
4562 if (chip_number == 4 && cy_readb(true_base_addr +
4563 (cy_chip_offset[0] << index) +
4564 (CyGFRCR << index)) == 0) {
4565 return chip_number;
4566 }
4567
4568 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4569 mdelay(1);
4570
4571 if (cy_readb(base_addr + (CyGFRCR << index)) == 0x00) {
4572 /*
4573 printk(" chip #%d at %#6lx is not responding ",
4574 chip_number, (unsigned long)base_addr);
4575 printk("(GFRCR stayed 0)\n",
4576 */
4577 return chip_number;
4578 }
4579 if ((0xf0 & (cy_readb(base_addr + (CyGFRCR << index)))) !=
4580 0x40) {
4581 /*
4582 printk(" chip #%d at %#6lx is not valid (GFRCR == "
4583 "%#2x)\n",
4584 chip_number, (unsigned long)base_addr,
4585 base_addr[CyGFRCR<<index]);
4586 */
4587 return chip_number;
4588 }
4589 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4590 if (cy_readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4591 /* It is a CD1400 rev. J or later */
4592 /* Impossible to reach 5ms with this chip.
4593 Changed to 2ms instead (f = 500 Hz). */
4594 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4595 } else {
4596 /* f = 200 Hz */
4597 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4598 }
1da177e4 4599
02f1175c
JS		 4600 /*
4601 printk(" chip #%d at %#6lx is rev 0x%2x\n",
4602 chip_number, (unsigned long)base_addr,
4603 cy_readb(base_addr+(CyGFRCR<<index)));
4604 */
4605 }
4606 return chip_number;
4607} /* cyy_init_card */
1da177e4
LT		 4608
4609/*
4610 * ---------------------------------------------------------------------
4611 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4612 * sets global variables and return the number of ISA boards found.
4613 * ---------------------------------------------------------------------
4614 */
02f1175c 4615static int __init cy_detect_isa(void)
1da177e4
LT		 4616{
4617#ifdef CONFIG_ISA
02f1175c
JS		 4618 unsigned short cy_isa_irq, nboard;
4619 void __iomem *cy_isa_address;
4620 unsigned short i, j, cy_isa_nchan;
1da177e4 4621#ifdef MODULE
02f1175c 4622 int isparam = 0;
1da177e4
LT		 4623#endif
4624
02f1175c 4625 nboard = 0;
1da177e4
LT		 4626
4627#ifdef MODULE
4628 /* Check for module parameters */
02f1175c
JS		 4629 for (i = 0; i < NR_CARDS; i++) {
4630 if (maddr[i] || i) {
4631 isparam = 1;
4632 cy_isa_addresses[i] = maddr[i];
4633 }
4634 if (!maddr[i])
4635 break;
1da177e4
LT		 4636 }
4637#endif
4638
02f1175c
JS		 4639 /* scan the address table probing for Cyclom-Y/ISA boards */
4640 for (i = 0; i < NR_ISA_ADDRS; i++) {
4641 unsigned int isa_address = cy_isa_addresses[i];
4642 if (isa_address == 0x0000) {
096dcfce 4643 return nboard;
02f1175c 4644 }
1da177e4 4645
02f1175c 4646 /* probe for CD1400... */
1da177e4 4647 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
02f1175c
JS		 4648 cy_isa_nchan = CyPORTS_PER_CHIP *
4649 cyy_init_card(cy_isa_address, 0);
4650 if (cy_isa_nchan == 0) {
4651 continue;
4652 }
1da177e4
LT		 4653#ifdef MODULE
4654 if (isparam && irq[i])
02f1175c 4655 cy_isa_irq = irq[i];
1da177e4
LT		 4656 else
4657#endif
02f1175c
JS		 4658 /* find out the board's irq by probing */
4659 cy_isa_irq = detect_isa_irq(cy_isa_address);
4660 if (cy_isa_irq == 0) {
4661 printk("Cyclom-Y/ISA found at 0x%lx ",
4662 (unsigned long)cy_isa_address);
4663 printk("but the IRQ could not be detected.\n");
4664 continue;
4665 }
4666
4667 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4668 printk("Cyclom-Y/ISA found at 0x%lx ",
4669 (unsigned long)cy_isa_address);
4670 printk("but no more channels are available.\n");
4671 printk("Change NR_PORTS in cyclades.c and recompile "
4672 "kernel.\n");
096dcfce 4673 return nboard;
02f1175c
JS		 4674 }
4675 /* fill the next cy_card structure available */
4676 for (j = 0; j < NR_CARDS; j++) {
4677 if (cy_card[j].base_addr == 0)
4678 break;
4679 }
4680 if (j == NR_CARDS) { /* no more cy_cards available */
4681 printk("Cyclom-Y/ISA found at 0x%lx ",
4682 (unsigned long)cy_isa_address);
4683 printk("but no more cards can be used .\n");
4684 printk("Change NR_CARDS in cyclades.c and recompile "
4685 "kernel.\n");
096dcfce 4686 return nboard;
02f1175c
JS		 4687 }
4688
4689 /* allocate IRQ */
4690 if (request_irq(cy_isa_irq, cyy_interrupt,
4691 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4692 printk("Cyclom-Y/ISA found at 0x%lx ",
4693 (unsigned long)cy_isa_address);
4694 printk("but could not allocate IRQ#%d.\n", cy_isa_irq);
096dcfce 4695 return nboard;
02f1175c
JS		 4696 }
4697
4698 /* set cy_card */
4699 cy_card[j].base_addr = cy_isa_address;
4700 cy_card[j].ctl_addr = NULL;
4701 cy_card[j].irq = (int)cy_isa_irq;
4702 cy_card[j].bus_index = 0;
4703 cy_card[j].first_line = cy_next_channel;
4704 cy_card[j].num_chips = cy_isa_nchan / 4;
4705 nboard++;
4706
4707 /* print message */
4708 printk("Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d, ",
4709 j + 1, (unsigned long)cy_isa_address,
4710 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4711 cy_isa_irq);
4712 printk("%d channels starting from port %d.\n",
4713 cy_isa_nchan, cy_next_channel);
4714 cy_next_channel += cy_isa_nchan;
4715 }
096dcfce 4716 return nboard;
1da177e4 4717#else
096dcfce 4718 return 0;
02f1175c
JS		 4719#endif /* CONFIG_ISA */
4720} /* cy_detect_isa */
1da177e4 4721
02f1175c 4722static void plx_init(void __iomem * addr, uclong initctl)
1da177e4 4723{
02f1175c
JS		 4724 /* Reset PLX */
4725 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x40000000);
4726 udelay(100L);
4727 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x40000000);
4728
4729 /* Reload Config. Registers from EEPROM */
4730 cy_writel(addr + initctl, cy_readl(addr + initctl) | 0x20000000);
4731 udelay(100L);
4732 cy_writel(addr + initctl, cy_readl(addr + initctl) & ~0x20000000);
1da177e4
LT		 4733}
4734
4735/*
4736 * ---------------------------------------------------------------------
4737 * cy_detect_pci() - Test PCI bus presence and Cyclom-Ye/PCI.
4738 * sets global variables and return the number of PCI boards found.
4739 * ---------------------------------------------------------------------
4740 */
02f1175c 4741static int __init cy_detect_pci(void)
1da177e4
LT		 4742{
4743#ifdef CONFIG_PCI
4744
02f1175c
JS		 4745 struct pci_dev *pdev = NULL;
4746 unsigned char cyy_rev_id;
4747 unsigned char cy_pci_irq = 0;
4748 uclong cy_pci_phys0, cy_pci_phys2;
4749 void __iomem *cy_pci_addr0, *cy_pci_addr2;
4750 unsigned short i, j, cy_pci_nchan, plx_ver;
4751 unsigned short device_id, dev_index = 0;
4752 uclong mailbox;
4753 uclong ZeIndex = 0;
4754 void __iomem *Ze_addr0[NR_CARDS], *Ze_addr2[NR_CARDS];
4755 uclong Ze_phys0[NR_CARDS], Ze_phys2[NR_CARDS];
4756 unsigned char Ze_irq[NR_CARDS];
4757 struct pci_dev *Ze_pdev[NR_CARDS];
4758
4759 for (i = 0; i < NR_CARDS; i++) {
4760 /* look for a Cyclades card by vendor and device id */
4761 while ((device_id = cy_pci_dev_id[dev_index]) != 0) {
4762 if ((pdev = pci_get_device(PCI_VENDOR_ID_CYCLADES,
4763 device_id, pdev)) == NULL) {
4764 dev_index++; /* try next device id */
4765 } else {
4766 break; /* found a board */
4767 }
4768 }
1da177e4
LT		 4769
4770 if (device_id == 0)
02f1175c 4771 break;
1da177e4
LT		 4772
4773 if (pci_enable_device(pdev))
02f1175c 4774 continue;
1da177e4 4775
02f1175c 4776 /* read PCI configuration area */
1da177e4
LT		 4777 cy_pci_irq = pdev->irq;
4778 cy_pci_phys0 = pci_resource_start(pdev, 0);
4779 cy_pci_phys2 = pci_resource_start(pdev, 2);
4780 pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4781
4782 device_id &= ~PCI_DEVICE_ID_MASK;
4783
02f1175c
JS		 4784 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4785 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
1da177e4 4786#ifdef CY_PCI_DEBUG
02f1175c
JS		 4787 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4788 pdev->bus->number, pdev->devfn);
4789 printk("rev_id=%d) IRQ%d\n",
4790 cyy_rev_id, (int)cy_pci_irq);
4791 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4792 "ctladdr=0x%lx\n",
4793 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
1da177e4
LT		 4794#endif
4795
02f1175c
JS		 4796 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4797 printk(" Warning: PCI I/O bit incorrectly "
4798 "set. Ignoring it...\n");
4799 pdev->resource[2].flags &= ~IORESOURCE_IO;
4800 }
1da177e4 4801
02f1175c
JS		 4802 /* Although we don't use this I/O region, we should
4803 request it from the kernel anyway, to avoid problems
4804 with other drivers accessing it. */
4805 if (pci_request_regions(pdev, "Cyclom-Y") != 0) {
4806 printk(KERN_ERR "cyclades: failed to reserve "
4807 "PCI resources\n");
4808 continue;
4809 }
1da177e4 4810#if defined(__alpha__)
02f1175c
JS		 4811 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
4812 printk("Cyclom-Y/PCI (bus=0x0%x, pci_id=0x%x, ",
4813 pdev->bus->number, pdev->devfn);
4814 printk("rev_id=%d) IRQ%d\n",
4815 cyy_rev_id, (int)cy_pci_irq);
4816 printk("Cyclom-Y/PCI:found winaddr=0x%lx "
4817 "ctladdr=0x%lx\n",
4818 (ulong)cy_pci_phys2,
4819 (ulong)cy_pci_phys0);
4820 printk("Cyclom-Y/PCI not supported for low "
4821 "addresses in Alpha systems.\n");
4822 i--;
4823 continue;
4824 }
1da177e4 4825#endif
02f1175c
JS		 4826 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Yctl);
4827 cy_pci_addr2 = ioremap(cy_pci_phys2, CyPCI_Ywin);
1da177e4
LT		 4828
4829#ifdef CY_PCI_DEBUG
02f1175c
JS		 4830 printk("Cyclom-Y/PCI: relocate winaddr=0x%lx "
4831 "ctladdr=0x%lx\n",
4832 (u_long)cy_pci_addr2, (u_long)cy_pci_addr0);
1da177e4 4833#endif
02f1175c
JS		 4834 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4835 cyy_init_card(cy_pci_addr2, 1));
4836 if (cy_pci_nchan == 0) {
4837 printk("Cyclom-Y PCI host card with ");
4838 printk("no Serial-Modules at 0x%lx.\n",
4839 (ulong) cy_pci_phys2);
4840 i--;
4841 continue;
4842 }
4843 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4844 printk("Cyclom-Y/PCI found at 0x%lx ",
4845 (ulong) cy_pci_phys2);
4846 printk("but no channels are available.\n");
4847 printk("Change NR_PORTS in cyclades.c and "
4848 "recompile kernel.\n");
096dcfce 4849 return i;
02f1175c
JS		 4850 }
4851 /* fill the next cy_card structure available */
4852 for (j = 0; j < NR_CARDS; j++) {
4853 if (cy_card[j].base_addr == 0)
4854 break;
4855 }
4856 if (j == NR_CARDS) { /* no more cy_cards available */
4857 printk("Cyclom-Y/PCI found at 0x%lx ",
4858 (ulong) cy_pci_phys2);
4859 printk("but no more cards can be used.\n");
4860 printk("Change NR_CARDS in cyclades.c and "
4861 "recompile kernel.\n");
096dcfce 4862 return i;
02f1175c 4863 }
1da177e4 4864
02f1175c
JS		 4865 /* allocate IRQ */
4866 if (request_irq(cy_pci_irq, cyy_interrupt,
4867 IRQF_SHARED, "Cyclom-Y", &cy_card[j])) {
4868 printk("Cyclom-Y/PCI found at 0x%lx ",
4869 (ulong) cy_pci_phys2);
4870 printk("but could not allocate IRQ%d.\n",
4871 cy_pci_irq);
096dcfce 4872 return i;
02f1175c
JS		 4873 }
4874
4875 /* set cy_card */
4876 cy_card[j].base_phys = (ulong) cy_pci_phys2;
4877 cy_card[j].ctl_phys = (ulong) cy_pci_phys0;
4878 cy_card[j].base_addr = cy_pci_addr2;
4879 cy_card[j].ctl_addr = cy_pci_addr0;
4880 cy_card[j].irq = (int)cy_pci_irq;
4881 cy_card[j].bus_index = 1;
4882 cy_card[j].first_line = cy_next_channel;
4883 cy_card[j].num_chips = cy_pci_nchan / 4;
4884 cy_card[j].pdev = pdev;
4885
4886 /* enable interrupts in the PCI interface */
4887 plx_ver = cy_readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4888 switch (plx_ver) {
4889 case PLX_9050:
4890
4891 cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4892 break;
4893
4894 case PLX_9060:
4895 case PLX_9080:
4896 default: /* Old boards, use PLX_9060 */
4897
4898 plx_init(cy_pci_addr0, 0x6c);
4899 /* For some yet unknown reason, once the PLX9060 reloads
4900 the EEPROM, the IRQ is lost and, thus, we have to
4901 re-write it to the PCI config. registers.
4902 This will remain here until we find a permanent
4903 fix. */
4904 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4905 cy_pci_irq);
4906
4907 cy_writew(cy_pci_addr0 + 0x68,
4908 cy_readw(cy_pci_addr0 +
4909 0x68) | 0x0900);
4910 break;
4911 }
4912
4913 /* print message */
4914 printk("Cyclom-Y/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
4915 j + 1, (ulong)cy_pci_phys2,
4916 (ulong) (cy_pci_phys2 + CyPCI_Ywin - 1),
4917 (int)cy_pci_irq);
4918 printk("%d channels starting from port %d.\n",
4919 cy_pci_nchan, cy_next_channel);
4920
4921 cy_next_channel += cy_pci_nchan;
4922 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4923 /* print message */
4924 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4925 pdev->bus->number, pdev->devfn);
4926 printk("rev_id=%d) IRQ%d\n",
4927 cyy_rev_id, (int)cy_pci_irq);
4928 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4929 "ctladdr=0x%lx\n",
4930 (ulong)cy_pci_phys2, (ulong)cy_pci_phys0);
4931 printk("Cyclades-Z/PCI not supported for low "
4932 "addresses\n");
4933 break;
4934 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
1da177e4 4935#ifdef CY_PCI_DEBUG
02f1175c
JS		 4936 printk("Cyclades-Z/PCI (bus=0x0%x, pci_id=0x%x, ",
4937 pdev->bus->number, pdev->devfn);
4938 printk("rev_id=%d) IRQ%d\n",
4939 cyy_rev_id, (int)cy_pci_irq);
4940 printk("Cyclades-Z/PCI: found winaddr=0x%lx "
4941 "ctladdr=0x%lx\n",
4942 (ulong) cy_pci_phys2, (ulong) cy_pci_phys0);
1da177e4 4943#endif
02f1175c
JS		 4944 cy_pci_addr0 = ioremap(cy_pci_phys0, CyPCI_Zctl);
4945
4946 /* Disable interrupts on the PLX before resetting it */
4947 cy_writew(cy_pci_addr0 + 0x68,
4948 cy_readw(cy_pci_addr0 + 0x68) & ~0x0900);
4949
4950 plx_init(cy_pci_addr0, 0x6c);
4951 /* For some yet unknown reason, once the PLX9060 reloads
4952 the EEPROM, the IRQ is lost and, thus, we have to
4953 re-write it to the PCI config. registers.
4954 This will remain here until we find a permanent
4955 fix. */
4956 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4957 cy_pci_irq);
4958
4959 mailbox =
4960 (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
4961 cy_pci_addr0)->mail_box_0);
4962
4963 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4964 printk(" Warning: PCI I/O bit incorrectly "
4965 "set. Ignoring it...\n");
4966 pdev->resource[2].flags &= ~IORESOURCE_IO;
4967 }
1da177e4 4968
02f1175c
JS		 4969 /* Although we don't use this I/O region, we should
4970 request it from the kernel anyway, to avoid problems
4971 with other drivers accessing it. */
4972 if (pci_request_regions(pdev, "Cyclades-Z") != 0) {
4973 printk(KERN_ERR "cyclades: failed to reserve "
4974 "PCI resources\n");
4975 continue;
4976 }
4977
4978 if (mailbox == ZE_V1) {
4979 cy_pci_addr2 = ioremap(cy_pci_phys2,
4980 CyPCI_Ze_win);
4981 if (ZeIndex == NR_CARDS) {
4982 printk("Cyclades-Ze/PCI found at "
4983 "0x%lx but no more cards can "
4984 "be used.\nChange NR_CARDS in "
4985 "cyclades.c and recompile "
4986 "kernel.\n",
4987 (ulong)cy_pci_phys2);
4988 } else {
4989 Ze_phys0[ZeIndex] = cy_pci_phys0;
4990 Ze_phys2[ZeIndex] = cy_pci_phys2;
4991 Ze_addr0[ZeIndex] = cy_pci_addr0;
4992 Ze_addr2[ZeIndex] = cy_pci_addr2;
4993 Ze_irq[ZeIndex] = cy_pci_irq;
4994 Ze_pdev[ZeIndex] = pdev;
4995 ZeIndex++;
4996 }
4997 i--;
4998 continue;
4999 } else {
5000 cy_pci_addr2 = ioremap(cy_pci_phys2,CyPCI_Zwin);
5001 }
1da177e4
LT		 5002
5003#ifdef CY_PCI_DEBUG
02f1175c
JS		 5004 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx "
5005 "ctladdr=0x%lx\n",
5006 (ulong) cy_pci_addr2, (ulong) cy_pci_addr0);
5007 if (mailbox == ZO_V1) {
5008 cy_writel(&((struct RUNTIME_9060 *)
5009 (cy_pci_addr0))->loc_addr_base,
5010 WIN_CREG);
096dcfce 5011 PAUSE;
02f1175c
JS		 5012 printk("Cyclades-8Zo/PCI: FPGA id %lx, ver "
5013 "%lx\n", (ulong) (0xff &
5014 cy_readl(&((struct CUSTOM_REG *)
5015 (cy_pci_addr2))->fpga_id)),
5016 (ulong)(0xff &
5017 cy_readl(&((struct CUSTOM_REG *)
5018 (cy_pci_addr2))->
5019 fpga_version)));
5020 cy_writel(&((struct RUNTIME_9060 *)
5021 (cy_pci_addr0))->loc_addr_base,
5022 WIN_RAM);
5023 } else {
5024 printk("Cyclades-Z/PCI: New Cyclades-Z board. "
5025 "FPGA not loaded\n");
5026 }
1da177e4 5027#endif
02f1175c
JS		 5028 /* The following clears the firmware id word. This
5029 ensures that the driver will not attempt to talk to
5030 the board until it has been properly initialized.
5031 */
096dcfce 5032 PAUSE;
02f1175c
JS		 5033 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5034 cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5035
5036 /* This must be a Cyclades-8Zo/PCI. The extendable
5037 version will have a different device_id and will
5038 be allocated its maximum number of ports. */
5039 cy_pci_nchan = 8;
5040
5041 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5042 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5043 "no channels are available.\nChange "
5044 "NR_PORTS in cyclades.c and recompile "
5045 "kernel.\n", (ulong)cy_pci_phys2);
096dcfce 5046 return i;
02f1175c 5047 }
1da177e4 5048
02f1175c
JS		 5049 /* fill the next cy_card structure available */
5050 for (j = 0; j < NR_CARDS; j++) {
5051 if (cy_card[j].base_addr == 0)
5052 break;
5053 }
5054 if (j == NR_CARDS) { /* no more cy_cards available */
5055 printk("Cyclades-8Zo/PCI found at 0x%lx but"
5056 "no more cards can be used.\nChange "
5057 "NR_CARDS in cyclades.c and recompile "
5058 "kernel.\n", (ulong)cy_pci_phys2);
096dcfce 5059 return i;
02f1175c
JS		 5060 }
5061#ifdef CONFIG_CYZ_INTR
5062 /* allocate IRQ only if board has an IRQ */
5063 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5064 if (request_irq(cy_pci_irq, cyz_interrupt,
5065 IRQF_SHARED, "Cyclades-Z",
5066 &cy_card[j])) {
5067 printk("Cyclom-8Zo/PCI found at 0x%lx "
5068 "but could not allocate "
5069 "IRQ%d.\n", (ulong)cy_pci_phys2,
5070 cy_pci_irq);
096dcfce 5071 return i;
02f1175c
JS		 5072 }
5073 }
5074#endif /* CONFIG_CYZ_INTR */
5075
5076 /* set cy_card */
5077 cy_card[j].base_phys = cy_pci_phys2;
5078 cy_card[j].ctl_phys = cy_pci_phys0;
5079 cy_card[j].base_addr = cy_pci_addr2;
5080 cy_card[j].ctl_addr = cy_pci_addr0;
5081 cy_card[j].irq = (int)cy_pci_irq;
5082 cy_card[j].bus_index = 1;
5083 cy_card[j].first_line = cy_next_channel;
5084 cy_card[j].num_chips = -1;
5085 cy_card[j].pdev = pdev;
5086
5087 /* print message */
1da177e4 5088#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5089 /* don't report IRQ if board is no IRQ */
5090 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5091 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, "
5092 "IRQ%d, ", j + 1, (ulong)cy_pci_phys2,
5093 (ulong) (cy_pci_phys2 + CyPCI_Zwin - 1),
5094 (int)cy_pci_irq);
5095 else
5096#endif /* CONFIG_CYZ_INTR */
5097 printk("Cyclades-8Zo/PCI #%d: 0x%lx-0x%lx, ",
5098 j + 1, (ulong)cy_pci_phys2,
5099 (ulong)(cy_pci_phys2 + CyPCI_Zwin - 1));
5100
5101 printk("%d channels starting from port %d.\n",
5102 cy_pci_nchan, cy_next_channel);
5103 cy_next_channel += cy_pci_nchan;
1da177e4 5104 }
02f1175c 5105 }
1da177e4 5106
02f1175c
JS		 5107 for (; ZeIndex != 0 && i < NR_CARDS; i++) {
5108 cy_pci_phys0 = Ze_phys0[0];
5109 cy_pci_phys2 = Ze_phys2[0];
5110 cy_pci_addr0 = Ze_addr0[0];
5111 cy_pci_addr2 = Ze_addr2[0];
5112 cy_pci_irq = Ze_irq[0];
5113 pdev = Ze_pdev[0];
5114 for (j = 0; j < ZeIndex - 1; j++) {
5115 Ze_phys0[j] = Ze_phys0[j + 1];
5116 Ze_phys2[j] = Ze_phys2[j + 1];
5117 Ze_addr0[j] = Ze_addr0[j + 1];
5118 Ze_addr2[j] = Ze_addr2[j + 1];
5119 Ze_irq[j] = Ze_irq[j + 1];
5120 Ze_pdev[j] = Ze_pdev[j + 1];
5121 }
5122 ZeIndex--;
5123 mailbox = (uclong)cy_readl(&((struct RUNTIME_9060 __iomem *)
5124 cy_pci_addr0)->mail_box_0);
1da177e4 5125#ifdef CY_PCI_DEBUG
02f1175c
JS		 5126 printk("Cyclades-Z/PCI: relocate winaddr=0x%lx ctladdr=0x%lx\n",
5127 (ulong)cy_pci_addr2, (ulong)cy_pci_addr0);
5128 printk("Cyclades-Z/PCI: New Cyclades-Z board. FPGA not "
5129 "loaded\n");
1da177e4 5130#endif
096dcfce 5131 PAUSE;
02f1175c
JS		 5132 /* This must be the new Cyclades-Ze/PCI. */
5133 cy_pci_nchan = ZE_V1_NPORTS;
5134
5135 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5136 printk("Cyclades-Ze/PCI found at 0x%lx but no channels "
5137 "are available.\nChange NR_PORTS in cyclades.c "
5138 "and recompile kernel.\n",
5139 (ulong) cy_pci_phys2);
096dcfce 5140 return i;
02f1175c 5141 }
1da177e4 5142
02f1175c
JS		 5143 /* fill the next cy_card structure available */
5144 for (j = 0; j < NR_CARDS; j++) {
5145 if (cy_card[j].base_addr == 0)
5146 break;
5147 }
5148 if (j == NR_CARDS) { /* no more cy_cards available */
5149 printk("Cyclades-Ze/PCI found at 0x%lx but no more "
5150 "cards can be used.\nChange NR_CARDS in "
5151 "cyclades.c and recompile kernel.\n",
5152 (ulong) cy_pci_phys2);
096dcfce 5153 return i;
02f1175c 5154 }
1da177e4 5155#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5156 /* allocate IRQ only if board has an IRQ */
5157 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5158 if (request_irq(cy_pci_irq, cyz_interrupt,
5159 IRQF_SHARED, "Cyclades-Z",
5160 &cy_card[j])) {
5161 printk("Cyclom-Ze/PCI found at 0x%lx ",
5162 (ulong) cy_pci_phys2);
5163 printk("but could not allocate IRQ%d.\n",
5164 cy_pci_irq);
096dcfce 5165 return i;
02f1175c 5166 }
1da177e4 5167 }
02f1175c
JS		 5168#endif /* CONFIG_CYZ_INTR */
5169
5170 /* set cy_card */
5171 cy_card[j].base_phys = cy_pci_phys2;
5172 cy_card[j].ctl_phys = cy_pci_phys0;
5173 cy_card[j].base_addr = cy_pci_addr2;
5174 cy_card[j].ctl_addr = cy_pci_addr0;
5175 cy_card[j].irq = (int)cy_pci_irq;
5176 cy_card[j].bus_index = 1;
5177 cy_card[j].first_line = cy_next_channel;
5178 cy_card[j].num_chips = -1;
1da177e4
LT		 5179 cy_card[j].pdev = pdev;
5180
02f1175c 5181 /* print message */
1da177e4
LT		 5182#ifdef CONFIG_CYZ_INTR
5183 /* don't report IRQ if board is no IRQ */
02f1175c
JS		 5184 if ((cy_pci_irq != 0) && (cy_pci_irq != 255))
5185 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, IRQ%d, ",
5186 j + 1, (ulong) cy_pci_phys2,
5187 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1),
5188 (int)cy_pci_irq);
1da177e4 5189 else
02f1175c
JS		 5190#endif /* CONFIG_CYZ_INTR */
5191 printk("Cyclades-Ze/PCI #%d: 0x%lx-0x%lx, ",
5192 j + 1, (ulong) cy_pci_phys2,
5193 (ulong) (cy_pci_phys2 + CyPCI_Ze_win - 1));
5194
5195 printk("%d channels starting from port %d.\n",
5196 cy_pci_nchan, cy_next_channel);
5197 cy_next_channel += cy_pci_nchan;
5198 }
1da177e4 5199 if (ZeIndex != 0) {
02f1175c
JS		 5200 printk("Cyclades-Ze/PCI found at 0x%x but no more cards can be "
5201 "used.\nChange NR_CARDS in cyclades.c and recompile "
5202 "kernel.\n", (unsigned int)Ze_phys2[0]);
1da177e4 5203 }
096dcfce 5204 return i;
1da177e4 5205#else
096dcfce 5206 return 0;
02f1175c
JS		 5207#endif /* ifdef CONFIG_PCI */
5208} /* cy_detect_pci */
1da177e4
LT		 5209
5210/*
5211 * This routine prints out the appropriate serial driver version number
5212 * and identifies which options were configured into this driver.
5213 */
02f1175c 5214static inline void show_version(void)
1da177e4 5215{
096dcfce 5216 printk("Cyclades driver " CY_VERSION "\n");
02f1175c
JS		 5217 printk(" built %s %s\n", __DATE__, __TIME__);
5218} /* show_version */
5219
5220static int
1da177e4 5221cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
02f1175c 5222 int *eof, void *data)
1da177e4 5223{
02f1175c
JS		 5224 struct cyclades_port *info;
5225 int i;
5226 int len = 0;
5227 off_t begin = 0;
5228 off_t pos = 0;
5229 int size;
5230 __u32 cur_jifs = jiffies;
5231
5232 size = sprintf(buf, "Dev TimeOpen BytesOut IdleOut BytesIn "
5233 "IdleIn Overruns Ldisc\n");
5234
5235 pos += size;
1da177e4 5236 len += size;
1da177e4 5237
02f1175c
JS		 5238 /* Output one line for each known port */
5239 for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5240 info = &cy_port[i];
5241
5242 if (info->count)
5243 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5244 "%8lu %9lu %6ld\n", info->line,
096dcfce 5245 (cur_jifs - info->idle_stats.in_use) / HZ,
02f1175c 5246 info->idle_stats.xmit_bytes,
096dcfce 5247 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
02f1175c 5248 info->idle_stats.recv_bytes,
096dcfce 5249 (cur_jifs - info->idle_stats.recv_idle) / HZ,
02f1175c
JS		 5250 info->idle_stats.overruns,
5251 (long)info->tty->ldisc.num);
5252 else
5253 size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5254 "%8lu %9lu %6ld\n",
5255 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5256 len += size;
5257 pos = begin + len;
5258
5259 if (pos < offset) {
5260 len = 0;
5261 begin = pos;
5262 }
5263 if (pos > offset + length)
5264 goto done;
1da177e4 5265 }
02f1175c 5266 *eof = 1;
1da177e4 5267done:
02f1175c
JS		 5268 *start = buf + (offset - begin); /* Start of wanted data */
5269 len -= (offset - begin); /* Start slop */
5270 if (len > length)
5271 len = length; /* Ending slop */
5272 if (len < 0)
5273 len = 0;
5274 return len;
1da177e4
LT		 5275}
5276
5277/* The serial driver boot-time initialization code!
5278 Hardware I/O ports are mapped to character special devices on a
5279 first found, first allocated manner. That is, this code searches
5280 for Cyclom cards in the system. As each is found, it is probed
5281 to discover how many chips (and thus how many ports) are present.
5282 These ports are mapped to the tty ports 32 and upward in monotonic
5283 fashion. If an 8-port card is replaced with a 16-port card, the
5284 port mapping on a following card will shift.
5285
5286 This approach is different from what is used in the other serial
5287 device driver because the Cyclom is more properly a multiplexer,
5288 not just an aggregation of serial ports on one card.
5289
5290 If there are more cards with more ports than have been
5291 statically allocated above, a warning is printed and the
5292 extra ports are ignored.
5293 */
5294
b68e31d0 5295static const struct tty_operations cy_ops = {
02f1175c
JS		 5296 .open = cy_open,
5297 .close = cy_close,
5298 .write = cy_write,
5299 .put_char = cy_put_char,
5300 .flush_chars = cy_flush_chars,
5301 .write_room = cy_write_room,
5302 .chars_in_buffer = cy_chars_in_buffer,
5303 .flush_buffer = cy_flush_buffer,
5304 .ioctl = cy_ioctl,
5305 .throttle = cy_throttle,
5306 .unthrottle = cy_unthrottle,
5307 .set_termios = cy_set_termios,
5308 .stop = cy_stop,
5309 .start = cy_start,
5310 .hangup = cy_hangup,
5311 .break_ctl = cy_break,
5312 .wait_until_sent = cy_wait_until_sent,
5313 .read_proc = cyclades_get_proc_info,
5314 .tiocmget = cy_tiocmget,
5315 .tiocmset = cy_tiocmset,
1da177e4
LT		 5316};
5317
02f1175c 5318static int __init cy_init(void)
1da177e4 5319{
02f1175c
JS		 5320 struct cyclades_port *info;
5321 struct cyclades_card *cinfo;
5322 int number_z_boards = 0;
5323 int board, port, i, index;
5324 unsigned long mailbox;
5325 unsigned short chip_number;
5326 int nports;
5327
5328 cy_serial_driver = alloc_tty_driver(NR_PORTS);
5329 if (!cy_serial_driver)
5330 return -ENOMEM;
5331 show_version();
5332
5333 /* Initialize the tty_driver structure */
5334
5335 cy_serial_driver->owner = THIS_MODULE;
5336 cy_serial_driver->driver_name = "cyclades";
5337 cy_serial_driver->name = "ttyC";
5338 cy_serial_driver->major = CYCLADES_MAJOR;
5339 cy_serial_driver->minor_start = 0;
5340 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5341 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5342 cy_serial_driver->init_termios = tty_std_termios;
5343 cy_serial_driver->init_termios.c_cflag =
5344 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5345 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW;
5346 tty_set_operations(cy_serial_driver, &cy_ops);
5347
5348 if (tty_register_driver(cy_serial_driver))
5349 panic("Couldn't register Cyclades serial driver\n");
5350
5351 for (i = 0; i < NR_CARDS; i++) {
5352 /* base_addr=0 indicates board not found */
5353 cy_card[i].base_addr = NULL;
5354 }
5355
5356 /* the code below is responsible to find the boards. Each different
5357 type of board has its own detection routine. If a board is found,
5358 the next cy_card structure available is set by the detection
5359 routine. These functions are responsible for checking the
5360 availability of cy_card and cy_port data structures and updating
5361 the cy_next_channel. */
5362
5363 /* look for isa boards */
5364 cy_isa_nboard = cy_detect_isa();
5365
5366 /* look for pci boards */
5367 cy_pci_nboard = cy_detect_pci();
5368
5369 cy_nboard = cy_isa_nboard + cy_pci_nboard;
5370
5371 /* invalidate remaining cy_card structures */
5372 for (i = 0; i < NR_CARDS; i++) {
5373 if (cy_card[i].base_addr == 0) {
5374 cy_card[i].first_line = -1;
5375 cy_card[i].ctl_addr = NULL;
5376 cy_card[i].irq = 0;
5377 cy_card[i].bus_index = 0;
5378 cy_card[i].first_line = 0;
5379 cy_card[i].num_chips = 0;
5380 }
5381 }
5382 /* invalidate remaining cy_port structures */
5383 for (i = cy_next_channel; i < NR_PORTS; i++) {
5384 cy_port[i].line = -1;
5385 cy_port[i].magic = -1;
5386 }
5387
5388 /* initialize per-port data structures for each valid board found */
5389 for (board = 0; board < cy_nboard; board++) {
5390 cinfo = &cy_card[board];
5391 if (cinfo->num_chips == -1) { /* Cyclades-Z */
5392 number_z_boards++;
5393 mailbox = cy_readl(&((struct RUNTIME_9060 __iomem *)
5394 cy_card[board].ctl_addr)->
5395 mail_box_0);
5396 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
5397 cinfo->intr_enabled = 0;
5398 cinfo->nports = 0; /* Will be correctly set later, after
5399 Z FW is loaded */
5400 spin_lock_init(&cinfo->card_lock);
5401 for (port = cinfo->first_line;
5402 port < cinfo->first_line + nports; port++) {
5403 info = &cy_port[port];
5404 info->magic = CYCLADES_MAGIC;
5405 info->type = PORT_STARTECH;
5406 info->card = board;
5407 info->line = port;
5408 info->chip_rev = 0;
5409 info->flags = STD_COM_FLAGS;
5410 info->tty = NULL;
5411 if (mailbox == ZO_V1)
5412 info->xmit_fifo_size = CYZ_FIFO_SIZE;
5413 else
5414 info->xmit_fifo_size =
5415 4 * CYZ_FIFO_SIZE;
5416 info->cor1 = 0;
5417 info->cor2 = 0;
5418 info->cor3 = 0;
5419 info->cor4 = 0;
5420 info->cor5 = 0;
5421 info->tbpr = 0;
5422 info->tco = 0;
5423 info->rbpr = 0;
5424 info->rco = 0;
5425 info->custom_divisor = 0;
5426 info->close_delay = 5 * HZ / 10;
5427 info->closing_wait = CLOSING_WAIT_DELAY;
5428 info->icount.cts = info->icount.dsr =
5429 info->icount.rng = info->icount.dcd = 0;
5430 info->icount.rx = info->icount.tx = 0;
5431 info->icount.frame = info->icount.parity = 0;
5432 info->icount.overrun = info->icount.brk = 0;
5433 info->x_char = 0;
5434 info->event = 0;
5435 info->count = 0;
5436 info->blocked_open = 0;
5437 info->default_threshold = 0;
5438 info->default_timeout = 0;
5439 INIT_WORK(&info->tqueue, do_softint);
5440 init_waitqueue_head(&info->open_wait);
5441 init_waitqueue_head(&info->close_wait);
5442 init_waitqueue_head(&info->shutdown_wait);
5443 init_waitqueue_head(&info->delta_msr_wait);
5444 /* info->session */
5445 /* info->pgrp */
5446 info->read_status_mask = 0;
5447 /* info->timeout */
5448 /* Bentson's vars */
5449 info->jiffies[0] = 0;
5450 info->jiffies[1] = 0;
5451 info->jiffies[2] = 0;
5452 info->rflush_count = 0;
1da177e4 5453#ifdef CONFIG_CYZ_INTR
02f1175c
JS		 5454 init_timer(&cyz_rx_full_timer[port]);
5455 cyz_rx_full_timer[port].function = NULL;
1da177e4 5456#endif
02f1175c
JS		 5457 }
5458 continue;
5459 } else { /* Cyclom-Y of some kind */
5460 index = cinfo->bus_index;
5461 spin_lock_init(&cinfo->card_lock);
5462 cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
5463 for (port = cinfo->first_line;
5464 port < cinfo->first_line + cinfo->nports; port++) {
5465 info = &cy_port[port];
5466 info->magic = CYCLADES_MAGIC;
5467 info->type = PORT_CIRRUS;
5468 info->card = board;
5469 info->line = port;
5470 info->flags = STD_COM_FLAGS;
5471 info->tty = NULL;
5472 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
5473 info->cor1 =
5474 CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
5475 info->cor2 = CyETC;
5476 info->cor3 = 0x08; /* _very_ small rcv threshold */
5477 info->cor4 = 0;
5478 info->cor5 = 0;
5479 info->custom_divisor = 0;
5480 info->close_delay = 5 * HZ / 10;
5481 info->closing_wait = CLOSING_WAIT_DELAY;
5482 info->icount.cts = info->icount.dsr =
5483 info->icount.rng = info->icount.dcd = 0;
5484 info->icount.rx = info->icount.tx = 0;
5485 info->icount.frame = info->icount.parity = 0;
5486 info->icount.overrun = info->icount.brk = 0;
5487 chip_number = (port - cinfo->first_line) / 4;
5488 if ((info->chip_rev =
5489 cy_readb(cinfo->base_addr +
5490 (cy_chip_offset[chip_number] <<
5491 index) + (CyGFRCR << index))) >=
5492 CD1400_REV_J) {
5493 /* It is a CD1400 rev. J or later */
5494 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
5495 info->tco = baud_co_60[13]; /* Tx CO */
5496 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
5497 info->rco = baud_co_60[13]; /* Rx CO */
5498 info->rflow = 0;
5499 info->rtsdtr_inv = 1;
5500 } else {
5501 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
5502 info->tco = baud_co_25[13]; /* Tx CO */
5503 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
5504 info->rco = baud_co_25[13]; /* Rx CO */
5505 info->rflow = 0;
5506 info->rtsdtr_inv = 0;
5507 }
5508 info->x_char = 0;
5509 info->event = 0;
5510 info->count = 0;
5511 info->blocked_open = 0;
5512 info->default_threshold = 0;
5513 info->default_timeout = 0;
5514 INIT_WORK(&info->tqueue, do_softint);
5515 init_waitqueue_head(&info->open_wait);
5516 init_waitqueue_head(&info->close_wait);
5517 init_waitqueue_head(&info->shutdown_wait);
5518 init_waitqueue_head(&info->delta_msr_wait);
5519 /* info->session */
5520 /* info->pgrp */
5521 info->read_status_mask =
5522 CyTIMEOUT | CySPECHAR | CyBREAK
5523 | CyPARITY | CyFRAME | CyOVERRUN;
5524 /* info->timeout */
5525 }
5526 }
5527 }
1da177e4
LT		 5528
5529#ifndef CONFIG_CYZ_INTR
02f1175c
JS		 5530 if (number_z_boards && !cyz_timeron) {
5531 cyz_timeron++;
5532 cyz_timerlist.expires = jiffies + 1;
5533 add_timer(&cyz_timerlist);
1da177e4 5534#ifdef CY_PCI_DEBUG
02f1175c 5535 printk("Cyclades-Z polling initialized\n");
1da177e4 5536#endif
02f1175c
JS		 5537 }
5538#endif /* CONFIG_CYZ_INTR */
5539
5540 return 0;
1da177e4 5541
02f1175c 5542} /* cy_init */
1da177e4 5543
02f1175c 5544static void __exit cy_cleanup_module(void)
1da177e4 5545{
02f1175c 5546 int i, e1;
1da177e4
LT		 5547
5548#ifndef CONFIG_CYZ_INTR
02f1175c
JS		 5549 if (cyz_timeron){
5550 cyz_timeron = 0;
5551 del_timer(&cyz_timerlist);
5552 }
1da177e4
LT		 5553#endif /* CONFIG_CYZ_INTR */
5554
02f1175c
JS		 5555 if ((e1 = tty_unregister_driver(cy_serial_driver)))
5556 printk("cyc: failed to unregister Cyclades serial driver(%d)\n",
5557 e1);
1da177e4 5558
02f1175c 5559 put_tty_driver(cy_serial_driver);
1da177e4 5560
02f1175c
JS		 5561 for (i = 0; i < NR_CARDS; i++) {
5562 if (cy_card[i].base_addr) {
5563 iounmap(cy_card[i].base_addr);
5564 if (cy_card[i].ctl_addr)
5565 iounmap(cy_card[i].ctl_addr);
5566 if (cy_card[i].irq
1da177e4 5567#ifndef CONFIG_CYZ_INTR
02f1175c 5568 && cy_card[i].num_chips != -1 /* not a Z card */
1da177e4 5569#endif /* CONFIG_CYZ_INTR */
02f1175c
JS		 5570 )
5571 free_irq(cy_card[i].irq, &cy_card[i]);
1da177e4 5572#ifdef CONFIG_PCI
02f1175c
JS		 5573 if (cy_card[i].pdev)
5574 pci_release_regions(cy_card[i].pdev);
1da177e4 5575#endif
02f1175c
JS		 5576 }
5577 }
1da177e4
LT		 5578} /* cy_cleanup_module */
5579
5580module_init(cy_init);
5581module_exit(cy_cleanup_module);
5582
5583MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)